Gem Dealer’s Secret – Table of Contents

This book is written as a guideline for the potential buyer of gemstones that are mined from the earth or formed by some natural organic process. As a knowledgeable buyer you will be a confident one. Natural gemstones offer the consumer many choices in all price ranges. This book is not intended as a reference work for gemologist, but as a practical guide for the informed amateur.

Handbook for the Gem Buyer - book cover

Many varieties of stones will be described in this book; some of them are quite common; some very rare. A few are mentioned that you would have difficulty in finding. Extremely rare colors or gemstone varieties which are primarily of interest to collectors and museums have been omitted from this text since these are not available to most consumers. Today more gemstone varieties are available to choose from than any prior time in history.

Technical information on gemstones is included to help you understand each variety’s unique properties. Gemology has become a professional and highly specialized field; a competent seller can be of great help in helping you make a wise and satisfying purchase.

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Table of Content

Part I – The Make-Up of a Gemstone

  1. The Joy of Gems
  2. The Formation of Gem Materials
  3. Optical and Physical Properties of Gemstones
  4. The 4 C’s of Gemstone Valuation
  5. The Treatment of Gemstones

Part II – The Personality of Gemstones

  1. Gemstone Name Reference List
  2. When You are Ready to Buy
  3. Andalusite
  4. Beryls: Aquamarine, Emerald, Morganite
  5. Chrysoberyl: Alexandrite and Catseye
  6. Cordierite: Iolite
  7. Corundum: Rubies and Sapphires
  8. Diamonds
  9. Feldspars: Moonstones, Labradorite
  10. Garnet: Almandine, Pyrope, Spessartine, Rhodolite, Grossular, Andradite
  11. Jades: Jadeite and Nephrite
  12. Lapis Lazuli
  13. Olivine: Peridot
  14. Opals
  15. Pearls, Cultured Pearls
  16. Quartz: Amethyst, Citrine, Chalcedonies, Agates, Chrysoprase, Bloodstones
  17. Spinel
  18. Spodumene: Kunzite and Hiddenite
  19. Topaz
  20. Tourmaline: Rubellite and Indicolite
  21. Turquoise
  22. Zircon
  23. Zoisite: Tanzanite
  24. Other Gemstones of Interest
  25. Man-Made Gem Materials

Part III – Helpful Information

  1. Birthstones
  2. Anniversary Stones
  3. Glossary

By Sondra Francis, G.G.
About the Author
Sondra Francis has scoured every major colored gemstone market in the world since 1978. She was a charter member of the American Gemstone Association and served as a board member. She was a founding member of the International Colored Gemstone Association. A true gem lover, Sondra has marketed her treasures on the wholesale and retail markets.
A special thanks to Pam Dulgar, Alex Edwards, Cheryl Kremkow, Kate Kirby, Helen Mitchell, Carol Morgan Page, David Pond, Elaine Proffitt, and Ray Zajicek for their help.
Photographs: Bart Curren and ICA Gembureau ; Alex Edwards, Pearl Sales Institute ; David Dikinis
All rights reserved internationally. Copyright © Sondra Francis, G.G.. Users have permission to download the information and share it as long as no money is made. No commercial use of this information is allowed without permission in writing from Sondra Francis, G.G.
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