ruby

  • About Lotus Gemology

    When you see a fine ruby, it does something to you. It’s not about the value.
    If it were simply the value, I’d go out and buy a kilo of gold. Richard Hughes to journalist Rod Nordland
    “On the treacherous trail to the rare ruby red”  |  1982  |  Asia

    Burmese star ruby. Photo: Wimon Manorotkul, Lotus Gemology.

    Lotus Gemology begins with a simple idea – beauty is the principal source of attraction for precious stones. Thus it should also be the major focus of gemology. In other words, the GEM is the most important part of gemology.

    It is our belief that gemology is not simply about counting atoms; to apply science absent a discussion of how it relates to aesthetics and desire does a disservice not just to clients, but to the jewels themselves. We do not believe that attraction can be reduced to a simple set of measurements, anymore than the beauty of a rainbow or sunset can be expressed by mathematical formula.

    Rest assured, we are not Luddites. We not only appreciate science, but use it daily. At the same time, we recognize that many parts of the human experience extend into realms far beyond science. Thus the gemology at Lotus includes not just science, but weaves into the mix history, culture, art and travel. We do this in the belief that these factors play equal roles in how humans perceive desirability and value. 

    Like a small French restaurant, we believe that crafting a fine meal takes time and individual care; thus our seating is limited. The translation of the intangibles of rarity and aesthetic beauty is our strength.

    Precious stones are among the most compelling examples of Mother Nature’s artistic genius.

    Lotus Gemology operates from a base of over 80 years of collective experience in the study, purchase, sale and appreciation of precious stones. Our lives have been enriched beyond measure by our involvement with these gifts of nature and we believe if we characterize them with the appropriate reverence and care, we can open this magical world to others. This is our goal.

     
     
  • Black Prince's Ruby | Blood-Red Souvenir of Conquest | Spinel

    The Black Prince's Ruby • Blood-Red Souvenir of Conquest

    The history of the Black Prince's Ruby, one of the world's most famous precious stones.

  • Book | Corundum | 1990

    Corundum cover, by Richard W. Hughes of Lotus Gemology

    Corundum

    Richard W. Hughes  |  1990

    Rubies and sapphires are widely considered to be among the most sought after and precious of gems. Together they account for over fifty percent of the world trade in colored gemstones. This book is the first from Richard Hughes on the subject, and the first major work to be devoted entirely to the corundum family of gemstones. It covers all aspects of rubies and sapphires, beginning with their history, chemical and physical properties. Other chapters look at treatments, synthetic corundums, methods of fashioning, famous rubies and sapphires, formation of corundum deposits and world sources, providing a valuable reference source for jewelers, gemologists, students, and the general reader.

    Out-of-print. Click here to search for a copy

  • Book | Inside Out | GEM•ology Through Lotus-Colored Glasses | 2020

    Inside Out | GEM•ology Through Lotus-Colored Glasses (2020)

    Inside Out  •  GEM•ology Through Lotus-Colored Glasses

    E. Billie Hughes, Richard W. Hughes, Wimon Manorotkul  |  2020

    From the dawn of time, precious stones have both attracted and fascinated humans in ways that few other items could. For while objects of desire are found throughout the natural world, physical beauty is too often ephemeral. From the allure of a man, woman, flower or butterfly, through the fleeting moments of a sunset, there is little that lasts and practically nothing that can be passed down to our descendants. The exception is precious stones. Not only are they the most durable creations of Mother Nature, but their visual splendor is truly eternal.

    This book presents a completely fresh approach to the subject. Dubbing it humanistic gemology, the authors take readers around the world, showing the places they have explored in their search for gems, along with the people and cultures encountered along the way. Within this volume, remarkable photographs of the human world are interwoven with images of the microscopic realm of the gems themselves. In a lifetime beset by time control, where living is broken into ever smaller bits, as you browse through these pages suddenly you plunge into a domain of frozen time, one that affords vistas of millions or even billions of years. For jewels offer not just superficial beauty, but a window on the primordial forces that birthed both our planet and universe.

    Inside Out – Gemology Through Lotus-Colored Glasses represents a fascinating new direction for gemology, linking the external and internal worlds of precious stones for the first time. 

    Inside Out | GEM•ology Through Lotus-Colored Glasses Order Page 

  • Book | Inside Out | Gemology Through Lotus-Colored Glasses | Order Page

    Inside Out • Gemology Through Lotus-Colored Glasses • Book Order Page • Lotus Gemology

    Inside Out: Gemology Through Lotus-Colored Glasses

    Introducing…

    Inside Out: GEM•ology Through Lotus-Colored Glasses

    by

    E. Billie Hughes  |  Richard W. Hughes  |  Wimon Manorotkul

    with a foreword by Paolo Minieri

    Chinese translation by Jason C.H. Kao (高嘉兴), with Jinding Yu (俞瑾玎) and Bonnie Chao (晁艳)

    From the dawn of time, precious stones have both attracted and fascinated humans in ways that few other items could. For while objects of desire are found throughout the natural world, physical beauty is too often ephemeral. From the allure of a man, woman, flower or butterfly, through the fleeting moments of a sunset, there is little that lasts and practically nothing that can be passed down to our descendants. The exception is precious stones. Not only are they the most durable creations of Mother Nature, but their visual splendor is truly eternal.

    This book presents a completely fresh approach to the subject. Dubbing it humanistic gemology, the authors take readers around the world, showing the places they have explored in their search for gems, along with the people and cultures encountered along the way.

    Within this volume, remarkable photographs of the human world are interwoven with images of the microscopic realm of the gems themselves. In a lifetime beset by time control, where living is broken into ever smaller bits, as you browse through these pages suddenly you plunge into a domain of frozen time, one that affords vistas of millions or even billions of years. For jewels offer not just superficial beauty, but a window on the primordial forces that birthed both our planet and universe.

    Inside Out – Gemology Through Lotus-Colored Glasses represents a fascinating new direction for gemology, linking the external and internal worlds of precious stones for the first time. 

    Published 2020; Now shipping

    Standard Edition – Hardcover
    Price: Thai Baht 3000 + Shipping & Handling

    International Shipping & Handling from Thailand
    Ships via International Parcel Air (2–3 weeks)

    Hardcover with Dust Jacket
    152 pages; 270 x 360 mm (10.6 x 14.2 inches); 2.5 kg shipping weight
    Full Color Throughout  |  Bilingual text in English & Simplified Chinese

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    Title Page

    Inside Out: Gemology Through Lotus-Colored Glasses – Title Page

    Introduction

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Sample Interior Spreads

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Inside Out: Gemology Through Lotus-Colored Glasses

    Ruby & Sapphire: A Gemologist's Guide – Index

     

    A few comments from reviewers…

    I am doubtless readers both inside and outside of the gem trade will enthusiastically welcome Inside Out. Buy it, read it, give it away. I am fully confident you will be satisfied, ingratiated and inspired.
    Jeffery Bergman – InColor Magazine
    This book fills a gap in the literature on gems by pictorially exploring the relationship between humans and gems on an artistic and emotional level. It is a work of art that lives from the quality of the photographs and gets by with minimal textual commentary on the images.
    Michael Hügi – Journal of Gemmology
    Inside Out is a truly stunning work reflecting the combnied personalities, skills, knowledge and philosophy of the authors, who have created something exceptional and innovative for the world of gemmology.
    Terry Coldham – Australian Gemmologist
  • Book | Jade | A Gemologist's Guide | 2022

    Jade • A Gemologist's Guide (2022)

    Jade  •  A Gemologist's Guide

    Richard W. Hughes, editor  |  2022

    The study of jade is unlike any other gem, trespassing across all conventional boundaries, particularly those of the gemological and mineralogical realm. Despite the march of mineralogical orthodoxy and conformity, the word “jade” is a fist in the air of protest, crying out not for reduction and definition, but an expansion of the mineralogical lexicon to include the cultural aspects of human civilization and life. The word “jade” is the anti-mineral. Because jade is so much more than a simple census of atoms, their valence states, and their places of residence.

    An understanding of jade is not limited to the technical or exacting; it also incorporates a feeling for the cultural, textural, and ephemeral qualities that make the study of this gem unlike any other in the world of gemstones. It is our heartfelt hope that this volume will not just fill the “traditional gemological” gap, but will open readers’ eyes to a world beyond. Because jade is so much more.

    While the literature on jade is vast, perhaps greater than any other gem, there is a distinct lack of a volume that treats jade as a gemological material. This book is designed to fill that gap, with extensive information on the history, sources, appraisal and identification of both treated and the various forms of imitation jade. All of this is together in a single volume for the first time, making this a must-have for all collectors, dealers, gemologists, appraisers, curators and anyone else with an interest in this fascinating gem.

    Jade • A Gemologist's Guide Order Page 

  • Book | Ruby & Sapphire | 1997

    Ruby & Sapphire

    Ruby & Sapphire

    Richard W. Hughes  |  1997

    Ruby & Sapphire is widely acknowledged as one of the finest gemology books ever published. Not just an update of his previous volumes on ruby and sapphire, it represents something rarely seen in a technical book, a fusion of accurate science and spirited, accessible prose. Within its pages, one finds information on prices, quality analysis, sources, history, treatments and identification. Featuring over 300 color photos and 2500 references, this now out-of-print volume is today highly sought after by collectors and gemologists, who pay as much as $1000 or more for the privilege of owning a copy.

    Out-of-print. Click here to search for a copy

  • Book | Ruby & Sapphire | A Collector's Guide | 2014

    Ruby & Sapphire  |  A Collector's Guide (2014)

    Ruby & Sapphire  •  A Collector's Guide

    Richard W. Hughes  |  2014

    Few gems capture the imagination like ruby and sapphire. This book removes the cloak of
 an otherwise secret world
. Drawing on a lifetime’s experience, 
the author ventures around the globe for the
 finest specimens, in the process allowing readers to discover 
the people and places where these rare gems are 
found, along with the story of the stones themselves. Throughout the text, Hughes guides readers with
 the steady connoisseur's eye, explaining what collectors should look for. For many pieces, actual
 auction prices are given, aiding collectors in their 
buying decisions. Illustrated with more than 300 color
 photographs, this is a visual and intellectual feast of
 the most delicious order.

    Ruby & Sapphire • A Collector's Guide order page

  • Book | Ruby & Sapphire | A Collector's Guide | 2014 | Order Page

    Ruby & Sapphire: A Collector's Guide

    Introducing…

    Ruby & Sapphire: A Collector’s Guide

    by Richard W. Hughes
    with photographs by Wimon Manorotkul and E. Billie Hughes

    This impressive coffee-table style volume takes readers into the secret world of ruby and sapphire, through the pen and lens of international expert, Richard Hughes. The author guides readers with the steady eye of a connoisseur, explaining what collectors should look for in ruby and sapphire. Many pictured pieces feature actual auction prices, aiding collectors in their buying decisions. Illustrated with more than 400 magnificent color photographs, for anyone with an interest in precious stones, this is a visual and intellectual feast of the most delicious order.

    Published 2014; Sold Out

    Hardcover with Dust Jacket
    384 pages; 240 x 280 mm (9.45 x 11 inches); 2.4 kg shipping weight
    Full Color Throughout

    Sold Out

    Check out our coffee-table style book Inside Out.


     

    Content

     

    Ruby & Sapphire: A Collector's Guide – Résumé

    1. Résumé

     

    Ruby & Sapphire: A Collector's Guide – Résumé

    History

     

    Ruby & Sapphire: A Collector's Guide – Source

    2. Source

     

    Ruby & Sapphire: A Collector's Guide – Source

    Geology

    Ruby & Sapphire: A Collector's Guide – Valley of Serpents

    Valley of Serpents

    Ruby & Sapphire: A Collector's Guide – Valley of Serpents

    Afghanistan

    Ruby & Sapphire: A Collector's Guide – Australia

    Australia

    Ruby & Sapphire: A Collector's Guide – India

    India

    Ruby & Sapphire: A Collector's Guide – Kenya

    Kenya

    Ruby & Sapphire: A Collector's Guide – Malawi

    Laos

    Ruby & Sapphire: A Collector's Guide – Madagascar

    Madagascar

    Ruby & Sapphire: A Collector's Guide – Malawi

    Malawi

    Ruby & Sapphire: A Collector's Guide – Mozambique

    Mozambique

    Ruby & Sapphire: A Collector's Guide – Myanmar

    Myanmar

    Ruby & Sapphire: A Collector's Guide – Nepal

    Nepal

    Ruby & Sapphire: A Collector's Guide – Nepal

    Pakistan

    Ruby & Sapphire: A Collector's Guide – Rwanda

    Rwanda

    Ruby & Sapphire: A Collector's Guide – Sri Lanka

    Sri Lanka

    Ruby & Sapphire: A Collector's Guide – Tajikistan

    Tajikistan

    Ruby & Sapphire: A Collector's Guide – Tanzania

    Tanzania

    Ruby & Sapphire: A Collector's Guide – Thailand & Cambodia

    Thailand & Cambodia

    Ruby & Sapphire: A Collector's Guide – Thailand & Cambodia

    Thailand & Cambodia

    Ruby & Sapphire: A Collector's Guide – Montana

    USA–Montana

    Ruby & Sapphire: A Collector's Guide – Vietnam

    Vietnam

     

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    3. Connoisseur

     

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    Cutting

     

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    From Pigeon's Blood to Peacock's Neck

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    Ruby & Sapphire Prices

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    Does Size Matter?

    Ruby & Sapphire: A Collector's Guide – Connoisseur

    The Tao of Jewelry

     

    Ruby & Sapphire: A Collector's Guide – Forensic

    4. Forensic

     

    Ruby & Sapphire: A Collector's Guide – Forensic

    Inner Space

    Ruby & Sapphire: A Collector's Guide – Forensic

    Enhancements

    Ruby & Sapphire: A Collector's Guide – Forensic

    Connoisseurship of Crystals

     

    Ruby & Sapphire: A Collector's Guide – Forensic

    5. Heart

     

    Ruby & Sapphire: A Collector's Guide – Forensic

    Gem Cutting in Thailand

     

    Ruby & Sapphire: A Collector's Guide – Forensic

    The Thai Jeweler's Art

     

    Ruby & Sapphire: A Collector's Guide – Library

    6. Library

     

    Ruby & Sapphire: A Collector's Guide – Library

    Library

     

    Ruby & Sapphire: A Collector's Guide – Library

    Library

     

    Ruby & Sapphire: A Collector's Guide – Portfolio

    7. Portfolio

     

    Ruby & Sapphire: A Collector's Guide – Portfolio

    Portfolio

     

    Ruby & Sapphire: A Collector's Guide – Index

    Index

     

  • Book | Ruby & Sapphire | A Gemologist's Guide | 2017

    Ruby & Sapphire  |  A Gemologist's Guide (2017)

    Ruby & Sapphire  •  A Gemologist's Guide

    Richard W. Hughes, with Wimon Manorotkul & E. Billie Hughes  |  2017

    Designed as a companion to Ruby & Sapphire: A Collector's Guide, this massive volume is aimed specifically at working gemologists, appraisers and students. Based on Richard W. Hughes' 1997 classic, Ruby & Sapphire, this edition is fully updated. The product of nearly 40 years of firsthand experience and research, it covers every aspect of the subject from A–Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. With over 1000 photos, maps and illustrations and 3500 references, Ruby & Sapphire—A Gemologist’s Guide represents the most comprehensive book ever written on a single precious stone.

    Ruby & Sapphire •  A Gemologist's Guide Order Page 

  • Book | Ruby & Sapphire | A Gemologist's Guide | Order Page

    Ruby & Sapphire: A Gemologist's Guide

    Introducing…

    Ruby & Sapphire: A Gemologist's Guide

    by Richard W. Hughes
    with Wimon Manorotkul and E. Billie Hughes

    This massive volume is the most comprehensive book ever written on a single precious stone. Designed as a companion volume to Ruby & Sapphire: A Collector's Guide, it is aimed specifically at working gemologists, appraisers and students. Based on Richard W. Hughes' 1997 classic, Ruby & Sapphire, this edition is fully updated. The product of nearly 40 years of firsthand experience and research, it covers every aspect of the subject from A–Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. Ruby & Sapphire—A Gemologist’s Guide represents the definitive reference on the subject. With over 1000 photos, maps and illustrations and 3500 references, it is nothing less than a tour-de-force of gemological scholarship.

     

    Published 2017; Sold Out

    International Shipping & Handling from Thailand
    Ships via International Parcel Air (2-3 weeks)

    Hardcover with Dust Jacket
    816 pages; 240 x 280 mm (9.45 x 11 inches); 4.6 kg shipping weight
    Full Color Throughout

    Standard & Limited Editions: Sold Out

    Check out our coffee-table style book Inside Out.


     

     

    Ruby & Sapphire: A Gemologist's Guide – Gallery

    Gallery

    Ruby & Sapphire: A Gemologist's Guide – Gallery

     

    Ruby & Sapphire: A Gemologist's Guide – Gallery

     

    Title Page

    Ruby & Sapphire: A Gemologist's Guide – Title Page

     

    Contents

    Ruby & Sapphire: A Gemologist's Guide – Contents

     

    Contents

    Ruby & Sapphire: A Gemologist's Guide – Contents

     

    Introduction

    Ruby & Sapphire: A Gemologist's Guide – Introduction

     

     

    Ruby & Sapphire: A Gemologist's Guide – History

    1. History

    Ruby & Sapphire: A Gemologist's Guide – History

     

    Ruby & Sapphire: A Gemologist's Guide – History

     

    Ruby & Sapphire: A Gemologist's Guide – Chemistry & Crystallography

    2. Chemistry & Crystallography

    Ruby & Sapphire: A Gemologist's Guide – Chemistry & Crystallography

     

    Ruby & Sapphire: A Gemologist's Guide – Chemistry & Crystallography

     

    Ruby & Sapphire: A Gemologist's Guide – Properties & Phenomena

    3. Properties & Phenomena

    Ruby & Sapphire: A Gemologist's Guide – Properties & Phenomena

     

    Ruby & Sapphire: A Gemologist's Guide – Properties & Phenomena

     

    Ruby & Sapphire: A Gemologist's Guide – Color, Spectra & Luminescence

    4. Color & Luminescence

    Ruby & Sapphire: A Gemologist's Guide – Color, Spectra & Luminescence

     

    Ruby & Sapphire: A Gemologist's Guide – Color, Spectra & Luminescence

     

    Ruby & Sapphire: A Gemologist's Guide – Inclusions

    5. Inclusions

    Ruby & Sapphire: A Gemologist's Guide – Inclusions

     

    Ruby & Sapphire: A Gemologist's Guide – Inclusions

     

    Ruby & Sapphire: A Gemologist's Guide – Treatments

    6. Treatments

    Ruby & Sapphire: A Gemologist's Guide – Treatments

     

    Ruby & Sapphire: A Gemologist's Guide – Treatments

     

    Ruby & Sapphire: A Gemologist's Guide – Synthetic Corundum

    7. Synthetic Corundum

    Ruby & Sapphire: A Gemologist's Guide – Synthetic Corundum

     

    Ruby & Sapphire: A Gemologist's Guide – Synthetic Corundum

     

    Ruby & Sapphire: A Gemologist's Guide – Assembled Stones

    8. Assembled Stones

    Ruby & Sapphire: A Gemologist's Guide – Assembled Stones

     

    Ruby & Sapphire: A Gemologist's Guide – Assembled Stones

     

    Ruby & Sapphire: A Gemologist's Guide – Methods of Fashioning

    9. Methods of Fashioning

    Ruby & Sapphire: A Gemologist's Guide – Methods of Fashioning

     

    Ruby & Sapphire: A Gemologist's Guide – Methods of Fashioning

     

    Ruby & Sapphire: A Gemologist's Guide – Judging Quality

    10. Judging Quality

    Ruby & Sapphire: A Gemologist's Guide – Judging Quality

     

    Ruby & Sapphire: A Gemologist's Guide – Judging Quality

     

    Ruby & Sapphire: A Gemologist's Guide – Geology

    11. Geology

    Ruby & Sapphire: A Gemologist's Guide – Geology

     

    Ruby & Sapphire: A Gemologist's Guide – Geology

     

     

    12. World Sources

    Ruby & Sapphire: A Gemologist's Guide – World Sources

     

     

    Afghanistan

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Afghanistan

    Australia

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Australia

    China

    Ruby & Sapphire: A Gemologist's Guide – World Sources: China

    Colombia

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Colombia

    France & Greenland

    Ruby & Sapphire: A Gemologist's Guide – World Sources: France & Greenland

    India

    Ruby & Sapphire: A Gemologist's Guide – World Sources: India

    Kenya

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Kenya

    Laos

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Laos

    Madagascar

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Madagascar

    Malawi

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Malawi

    Mozambique

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Mozambique

    Myanmar

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Myanmar

    Nepal & Nigeria

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Nepal & Nigeria

    Pakistan

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Pakistan

    Rwanda

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Rwanda

    Sri Lanka

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Sri Lanka

    Tajikistan

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Tajikistan

    Tanzania

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Tanzania

    Thailand/Cambodia

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Thailand/Cambodia

    USA

    Ruby & Sapphire: A Gemologist's Guide – World Sources: USA

    Vietnam

    Ruby & Sapphire: A Gemologist's Guide – World Sources: Vietnam

     

    Appendix A: Tagore's Mani-Mala

    Ruby & Sapphire: A Gemologist's Guide – Appendix A: Tagore's Mani-Mala

     
     

    Appendix B: Prices & ID Flow Charts

    Ruby & Sapphire: A Gemologist's Guide – Appendix B: Prices & ID Flow Charts

     
     

    Index

    Ruby & Sapphire: A Gemologist's Guide – Index

     

     

    Click on the icon to download a corrected Table of Contents and Errata sheet for the current volume (PDF).

    Errata

    Comments from reviewers…

    Voilà un livre de poids, 735 pages et plus de 4 kg qui enrichira vos connaissances historiques comme scientifiques et gemmologiques. L' auteur, bien connu des gemmologues, nous offre un nouveau voyage dans l' univers des corindons. C' est un livre à regarder, approcher, toucher, feuilleter, découvrir enen l' ouvrant avec à la fois impatience et retenue, pour finalement s' y abandonner. C' est une leçon de vie, un livre-compagnon à déguster sans modération.

     —Association Française de Gemmologie

     
     
     
  • Book | Ruby & Sapphire Colors | From Peacock to Pigeon's Blood | 2017

    From Peacock to Pigeon's Blood

    From Peacock to Pigeon's Blood  •  An Introduction to Ruby & Sapphire Colors

    Lotus Gemology  |  2017

    An introduction to the ruby & sapphire color types used at Lotus Gemology.

    From Peacock to Pigeon's Blood Order Page 

  • Book Review | Diamond | An Early History of the King of Gems

    Book Review: Diamonds – An Early History

    Diamond: An Early History of the King of Gems by Jack Ogden, 2018. Yale University Press, New Haven and London, www.yalebooks.com/www.yalebooks.co.uk, 388 pages, illus., ISBN 978-0-300-21566-3. $40 hardcover.

  • Book Review | Photoatlas of Inclusions in Gemstones, Volume 2 | Lotus Gemology

    Photoatlas of Inclusions in Gemstones, Volume 2 • A Book Review

    Gübelin, Eduard J. & Koivula, John I. (2005) Photoatlas of Inclusions in Gemstones, Volume 2. Opinio Publishers, Basel, Switzerland, 830 pp. ISBN 978-3855040957

  • Book Review | Ruby, Sapphire & Spinel | An Archaeological, Textual and Cultural Study

    Book Review: Ruby, Sapphire & Spinel: An Archaeological, Textual and Cultural Study

    Ruby, Sapphire & Spinel: An Archaeological, Textual and Cultural Study By Derek J. Content, 2016. Brepols Publishers, Turnhout, Belgium, www.brepols.net, 452 pages, illus., ISBN 978-2503568089. €150.00 hardcover.

  • Buying at the Source | Dick's Law and Other Sundry Maxims of the East

    Buying at the Source

    An essay on buying gems at the source in Asia, with a discussion of how con men play on the greed of those who believe gems will be cheaper at the mines.

  • Colored Stone Grading | A Heretic's Guide

    Colored Stone Grading • A Heretic's Guide

    Developing a comprehensive colored stone grading system has been the dream of gemologists since the late 1970's, but despite a number of valient attempts, we are no closer to the goal today than we were four decades ago. This article examines the various problems of colored stone grading, explaining why the challenges are at least an order of magnitude greater than the grading of diamonds.

  • Describing Color in Gems | A Fool's Guide

    Describing Color in Gems • A Fool's Guide • Lotus Gemology

    Color types such as "pigeon's blood," "Paraíba" and "cobalt blue" have become wildly popular in the gem trade. But there is a vast difference between coining such terms and applying them in a way that is both consistent and logical. Richard Hughes casts a critical eye on the subject.

  • Discover the Gemstones: Ruby & Sapphire Exhibition | Hong Kong

    Experience the hidden world of ruby & sapphire in this exhibition with Lotus Gemology and Van Cleef & Arpels' L'École School of Jewelry Arts

  • Downtown | Gem Hunting in Tanzania

    Downtown: Gem hunting in Central & Southern Tanzania  |  Lotus Gemology

    Since the late 1960's, East Africa has been home to some of planet earth's greatest gem discoveries. And yet, little has been written about certain of these finds. In the autumn of 2007, the authors set out to fill in the gaps, specifically regarding Tanzania's Mahenge, Songea and Tunduru regions.

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