玉石选购指南

橄榄石购买指南

闪锌矿购买指南

青金石购买指南

钼矿石购买指南

翡翠购买指南

Kunzite购买指南

钻石评级:初学者指南

Tridacna珍珠购买指南

蓝宝石购买指南

尖晶石购买指南

亚摩利人购买指南

黄水晶购买指南

马来亚石榴石购买指南

玛瑙购买指南

锆石购买指南

绿松石购买指南

欧泊购买指南

曲解购买指南

珍珠购买指南

坦桑石购买指南

金红石购买指南

甜瓜珍珠购买指南

水晶石英购买指南

Demantoid石榴石购买指南

月光石购买指南

石榴石购买指南

珍贵珊瑚购买指南

海蓝宝石购买指南

翠绿宝石购买指南

紫水晶购买指南

琥珀购买指南

俄勒冈太阳石购买指南

蓝碧玺购买指南

红宝石碧玺购买指南

铬碧玺购买指南

绿碧玺(绿宝石)购买指南

碧玺购买指南

西瓜碧玺购买指南

黄玉购买指南

Paraíba碧玺购买指南

Creating an Ethical Engagement Ring: the Complete 指南

Padparadscha蓝宝石购买指南

海螺珍珠购买指南

青石购买指南

Ruby购买指南

详细的宝石购买指南与示例图片和宝石价格. 涵盖颜色，净度，切割，克拉，原产地，价值，批发和零售价格，以及更多.

宝石购买指南

Agate

Chalcedony

Fire Agate

Fossilized Organisms

Iris Agate

Alexandrite

Chrysoberyl

Amber

Amethyst

Ammolite

Aquamarine

Chrysoprase

Citrine

Coral

Organic 宝石

Demantoid Garnet

Diamond

Emerald

Almandine Garnet

Almandine-Pyrope

Andradite

Andradite-Grossular

Chrome Pyrope

Color Change Garnet

Gadolinium Gallium Garnet

Garnet

Grossular Garnet

Hessonite

Hibschite

Hydrogrossular Garnet

Malaia Garnet (Malaya Garnet)

Mali Garnet

Mandarin Garnet

Melanite

Proteus

Pyrope Garnet

Pyrope-Spessartine

Rhodolite Garnet

Spessartite Garnet

Topazolite

Transvaal Jade

Tsavorite Garnet

Umbalite

Uvarovite Garnet

Yttrium Aluminium Garnet

Cordierite

Iolite

Jade

Jadeite

Maw Sit Sit

Nephrite

Lapis Lazuli

Feldspar

Labradorite

Moonstone

Peristerite

Morganite

Opal Stone

Oregon Sunstone

Padparadscha Sapphire

Cuprian Elbaite

Paraíba Tourmaline

Calcareous Concretions

Conch Pearl

Freshwater Pearl

Mother of Pearl

Pearl

Saltwater Pearl

Peridot

Ametrine

Prasiolite

Quartz

Rock Crystal

Rose Quartz

Rutilated Quartz

Smoky Quartz

Tourmalinated Quartz

Tourmaline

Rubellite

Ruby

Sapphire

Sphalerite

Spinel

Kunzite

Spodumene

Tanzanite (Zoisite)

Zoisite

Topaz

Chrome-Tourmaline

Elbaite

Indicolite

Verdelite

Watermelon Tourmaline

Turquoise

Hyacinth

Starlite

Zircon

评估

宝石切割

宝石学实验室

宝石

粗糙的宝石 and 矿物标本

珠宝

宝石学供应 and 设备

拍卖

宝石治疗

信息资源

宝石的供应 and 设备

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宝石学 Cheat Sheets

Pyroxmangite Value, Price, and 珠宝 Information

Demantoid Garnets

What is this Blue Gem Material?

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Gübelin Grades an Exceptional Vietnamese Ruby with “Pigeon’s Blood” Color

Distinguishing Common Jade Lookalikes

An Interview with “Diamond Wizard” Maarten de Witte: Part 4

Jade Color Trade Names

In 2012, Donald Clark retired and passed along stewardship of the IGS to the Rosen family, who were longtime members of IGS. Lisa Rosen runs the day-to-day operation of IGS and  <a href="http://www.ganoksin.com/">The Ganoksin Project, a technical resource website for bench jewelers and jewelry manufacturers</a>.  Lisa strongly believes that IGS must remain a cost-effective, accurate, and comprehensive resource for all those interested in gemology. IGS is our passion, and it is a family business.

Lisa Rosen

The late Donald Clark, CSM founded the 国际宝石学会 in 1998. Donald started in the gem and jewelry industry in 1976. He received his formal gemology training from the Gemological Institute of America (GIA) and the American Society of Gemcutters (ASG). The letters &#8220;CSM&#8221; after his name stood for Certified Supreme Master Gemcutter, a designation of Wykoff&#8217;s ASG which has often been referred to as the doctorate of gem cutting. The American Society of Gemcutters only had 54 people reach this level. Along with dozens of articles for leading trade magazines, Donald authored the book &#8220;Modern Faceting, the Easy Way.&#8221;

Donald Clark, CSM IMG

Jeffery Bergman, SSEF SGC, founder and director of <a href="http://www.primagem.com/">8th Dimension Gems</a> in Thailand, is an American gem dealer with more than 40 years of experience in gemstone and fine jewelry mining, cutting, wholesaling and retailing. His career has taken him to more than 50 countries and every continent except Antarctica. He has appeared on the BBC, CNN, NBC, ABC and GEO; and has been featured in Time, USA Today, National Geographic, Gems &amp; 宝石学 and Discovery Channel magazine. He is a regular guest speaker at gem lab seminars and gemological association conferences and universities.

Jeffery Bergman, SSEF SGC

Dr. Joel E. Arem has more than 60 years of experience in the world of gems and minerals. After obtaining his Ph.D. in Mineralogy from Harvard University, he has published numerous books that are still among the most widely used references and guidebooks on crystals, gems and minerals in the world.
Co-founder and President of numerous organizations, Dr. Arem has enjoyed a lifelong career in mineralogy and gemology. He has been a Smithsonian scientist and Curator, a consultant to many well-known companies and institutions, and a prolific author and speaker. Although his main activities have been as a gem cutter and dealer, his focus has always been education. <a href="http://www.joelarem.com/">joelarem.com</a>

Joel E. Arem, Ph.D., FGA