corundum

  • A Sapphire's Secret • Synthetic Yellow Sapphire

    A Sapphire's Secret

    At the Lotus Gemology laboratory in Bangkok, we often get parcels of relatively uniform stones. But sometimes it is in this routine testing that we uncover surprises.

  • Beryllium Diffusion in Orange Sapphire • The Skin Game

    The Skin Game • Beryllium Diffusion in Sapphire

    The early history of beryllium diffusion in sapphire, starting with the 2001 appearance of large numbers of padparadscha sapphires in the Thai gem market.

  • 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.

  • Burmese Sapphire Giants • Lotus Gemology

    Burmese Sapphire Giants

    A brief history of Burmese (Myanmar) sapphires, along with details of some of the major pieces of yore.

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

    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.

  • Cobalt-Doped Glass-Filled Sapphires • An Update • Lotus Gemology

    Cobalt-Doped Glass-Filled Sapphires  |  An Update  |  Lotus Gemology

    The history of glass-infilling in blue sapphire, along with a description of the latest treatment generation developed in Chanthaburi, Thailand.

  • 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.

  • Corundum (1990) • Lotus Gemology

    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

  • Downtown • Gem Hunting in Tanzania • Lotus Gemology

    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.

  • Fracture Healing of Ruby • Fluxed Up

    Fracture Healing of Ruby • Fluxed Up

    A discussion of the flux-healing treatment of rubies. This article was given the Richard T. Liddicoat Journalism Award by the American Gem Society in 2005.

  • FTIR in Gem Testing • A Pink Sapphire Lesson

    FTIR in Gem Testing • A Pink Sapphire Lesson

    A discussion of DRIFTS vs the Beam Condenser FTIR attachment in the testing of pink sapphire. The DRIFTS accessory is generally much better at unmasking heat treatment in ruby and sapphire.

  • Gem Inclusion Pairs • Hyperion Siamese Twins

    Gem Inclusion Pairs • Hyperion Siamese Twins

    Why should Hugh Hefner be the only one to enjoy twins? This special Hyperion Inclusion Gallery features images from the Lotus Gemology Hyperion Inclusion Database, but are shown as pairs, all the better to compare one form of beauty with another.

  • Gem Inclusions & the Symmetry of Crystals • Inside Out • Lotus Gemology

    Gem Inclusions & the Symmetry of Crystals • Inside Out • Lotus Gemology

    A discussion of how inclusion patterns mimic crystallographic symmetry in ruby and sapphire.

  • Gem Treatment Disclosure • Trust • Lotus Gemology

    Trust  •  The Ethics of Gem Treatment Disclosure

    The ethics of gem enhancement disclosure.

  • Gems & Gemology Lectures • Lotus Gemology Bangkok

    Gems & Gemology Lectures

    Lotus Gemology's gemologists have lectured extensively about a wide variety of gemological topics including ruby, sapphire, jade, and more.

  • Heat Seeker • UV Fluorescence as a Gemological Tool • Lotus Gemology

    Heat Seeker  |  UV Fluorescence as a Gemological Tool

    One of the greatest gemological challenges is determining if a ruby or sapphire has been heat treated. UV fluorescence can assist in that identification, as well as detecting fillers in emerald.

  • Identifying Yellow Sapphire • Blue Filter • Proletarian Gemology

    Identifying Yellow Sapphire • Blue Filter • Proletarian Gemology

    Introducing the blue filter as a gemological tool to separate natural and Verneuil synthetic yellow sapphires.

  • Inclusions in Gemstones • Hyperion Literature Sources

    Hyperion • The Literature of Inclusions in Gemstones

    For those who wish to explore the literature of inclusions in gemstones further, we have selected the following articles and books that are of particular merit. Most of these are cited in the Lotus Gemology Hyperion Inclusion Database, but are listed below in a more convenient summary format. Many of the links will allow you to download a PDF copy of the original article.

  • 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; Shipping October 2019

    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

    Once you click the "Add to Cart" button below, you can select the quantity on the next page.
    Discounts available for orders of 16 copies or more; please contact us.

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

    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 

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