judging quality

  • Brilliance, Windows, and Extinction in Gemstones • Lotus Gemology

    Brilliance, Windows, and Extinction in Gemstones

    A discussion of brilliance, windows and extinction as they relate to the face-up appearance of colored gemstones. Diagrams demonstrate that extinction is largely a function of cut.

  • Burmese Jade • The Inscrutable Gem • Lotus Gemology

    Burmese Jade  |  The Inscrutable Gem

    Myanmar's jadeite mines occupy a privileged place, representing the planet's principal source of fine jadeite jade. This article covers the deposits themselves, along with the cutting, grading and trading of jadeite.

  • 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.

  • From Peacock to Pigeon's Blood • Lotus Gemology Color Types

    From Peacock to Pigeon's Blood: Deconstructing Lotus Color Types

    A brief description of the color types for ruby and sapphire used at Lotus Gemology.

  • Gem Treatment Disclosure • Trust • Lotus Gemology

    Trust  |  The Ethics of Gem Treatment Disclosure

    The ethics of gem enhancement disclosure.

  • Jade Buying Guide • Jade Auction Records • Lotus Gemology

    Jade Buying Guide • LotusGemology.com

    This article discusses the factors that influence quality and what to look for when buying both jadeite and nephrite. A list of jade auction records is also included.

  • Padparadscha Sapphire • Ownership of Words • Lotus Gemology

    Ownership of Words  |  An Essay on Padparadscha Sapphire

    The definition of padparadscha sapphire, from early to modern times.

  • Ruby & Sapphire (1997) • Lotus Gemology

    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

  • Ruby & Sapphire • A Collector's Guide • Order Page • Lotus Gemology

    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; Available Now!

    PRICE: US$99 (Thai Baht 3250) + Shipping & Handling

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

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

    For orders of four or more, please contact us.

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    Ruby & Sapphire: A Collector's Guide – Contents

    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

     

  • Ruby & Sapphire • A Gemologist's Guide • Order Page • Lotus Gemology

    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; Now Shipping!

    PRICE: US$200 (Thai Baht 7000) + Shipping & Handling

    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

    Once you click the "Add to Cart" button below, you can select the quantity on the next page.
    For orders of four or more, please contact us.

    Order This Book Here (Now Shipping)


     

    Book + Shipping
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    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

    A few 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

     
     
     
  • Ruby Connoisseurship • Seeing Red • Lotus Gemology

    Seeing Red  |  A Guide to Ruby Connoisseurship

    A loving look at ruby from the standpoint of the connoisseur.

  • Ruby, Sapphire & Spinel Auction Records • Under the Hammer • Lotus Gemology

    Under the Hammer  |  Ruby & Sapphire Auction Records

    World auction records for ruby, sapphire and spinel.

  • Sapphire Connoisseurship • Passion Fruit • Lotus Gemology

    Passion Fruit  |  A Lover's Guide to Sapphire

    Sapphire is one of the classic gems. In this article, Lotus Gemology's resident connoisseur casts a discerning eye at the factors that contribute to quality in this legendary precious stone.

  • Spinel • Resurrection of a Classic • Lotus Gemology

    Burmese spinel

    Since the turn of the millennium, the price of fine spinel has risen at an incredible pace. No longer simply the poor man's ruby, spinel is finally getting the attention it deserves as one of the world's premier gems.

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