Actinolite

Actinolite Value, Price, and Jewelry Information

Actinolite – Natural, Faceted, Green

Adamite

Brilliant pear-cut cuprian adamite, 0.86 cts, 7.6 x 4.8 mm, Mapimi, Durango, Mexico. © <a href="https://www.thegemtrader.com/" data-wpel-link="external" target="_blank" rel="external noopener">The Gem Trader</a>. Used with permission.

Adamite Value, Price, and Jewelry Information

Adamite – Natural, Faceted, Blue, 0.86 ct

Rectangular-cut cuprian adamite, 0.73 cts, 4.9 x 4.1 mm, Laurion, Greece. © <a href="https://www.thegemtrader.com/">The Gem Trader</a>. Used with permission.

Adamite – Natural, Faceted, Green, 0.73 ct

Adamite: Ojuela Mine, Mapimi, Mexico (0.86). Photo © <a href="http://www.joelarem.com/" data-wpel-link="external" target="_blank" rel="external noopener">Joel E. Arem</a>, PhD, FGA. Used with permission.

Adamite – Natural, Faceted, Yellow, 0.86 ct

This cuprian Adamite <a href="https://www.irocks.com/minerals/specimen/45976">crystal specimen</a> also contains traces of cesium (Cs) as well as the rare-earth elements cerium (Ce) and dysprosium (Dy). Hilarion Mine, Laurium, Attiki Prefecture, Greece, 6.0 x 5.7 x 2.4 cm. © Rob Lavinsky, <a href="http://www.irocks.com/">www.iRocks.com</a>. Used with permission.

Adamite – Natural, Specimen, Blue

<a href="https://www.irocks.com/minerals/specimen/41168">Adamites on gossan matrix</a>, ultraviolet light. Ojuela Mine, Mapimi, Durango, Mexico, 10.5 x 9.3 x 6.2 cm. © Rob Lavinsky, <a href="http://www.irocks.com/">www.iRocks.com</a>. Used with permission.

Adamite – Natural, Specimen, Green

Cuprian adamite, Tsumeb, Namibia, on display at the <a href="https://naturalhistory.si.edu" data-wpel-link="external" target="_blank" rel="external noopener">Smithsonian National Museum of Natural History</a>. <a href="https://www.flickr.com/photos/thisisbossi/3526740643/" data-wpel-link="external" target="_blank" rel="external noopener">Photo</a> by <a href="https://www.flickr.com/photos/thisisbossi/" data-wpel-link="external" target="_blank" rel="external noopener">thisisbossi</a>. Licensed under <a href="https://creativecommons.org/licenses/by-sa/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By-SA 2.0</a>.

Manganoan adamite and lotharmeyerite, Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico. <a href="https://commons.wikimedia.org/wiki/File:Adamitemexique3.jpg" data-wpel-link="external" target="_blank" rel="external noopener">Photo</a> by <a href="https://commons.wikimedia.org/wiki/User:Archaeodontosaurus" data-wpel-link="external" target="_blank" rel="external noopener">Didier Descouens</a>. Licensed under <a href="https://creativecommons.org/licenses/by-sa/3.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By-SA 3.0</a>. (<a href="https://www.mindat.org/min-2439.html" data-wpel-link="external" target="_blank" rel="external noopener">Lotharmeyerite</a> occurs here as tiny, dark red crystals).

Adamite – Natural, Specimen, White

<a href="https://www.irocks.com/minerals/specimen/41168">Adamites on gossan matrix</a>, normal light. Ojuela Mine, Mapimi, Durango, Mexico, 10.5 x 9.3 x 6.2 cm. © Rob Lavinsky, <a href="http://www.irocks.com/">www.iRocks.com</a>. Used with permission.

Adamite – Natural, Specimen, Yellow

Agate

Chalcedony

Quartz

<a href="https://www.flickr.com/photos/74085116@N00/7070616183/" data-wpel-link="external" target="_blank" rel="external noopener">"Moss Agate 3"</a> by <a href="https://www.flickr.com/photos/74085116@N00/" data-wpel-link="external" target="_blank" rel="external noopener">Nicole Pellegrini</a> is licensed under <a href="https://creativecommons.org/licenses/by/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By 2.0</a>

Agate Value, Price, and Jewelry Information

Agate – Natural, Bead, Green

<a href="https://www.flickr.com/photos/deidrew/4446680630/" data-wpel-link="external" target="_blank" rel="external noopener">"Moss Agate Ring"</a> by <a href="https://www.flickr.com/photos/deidrew/" data-wpel-link="external" target="_blank" rel="external noopener">Deidre Woollard</a>. Licensed under <a href="https://creativecommons.org/licenses/by/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By 2.0</a>.

What is Your Gemstone Personality?

Agate – Natural, Cabochon, Black

Can you rely on gemstone certificates to disclose whether stones have been <a href="https://www.gemsociety.org/article/gemstone-treatment-and-enhancement/" data-wpel-link="internal">treated or enhanced</a> to improve their appearance or alter their colors? Artificially colored blue <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a>. <a href="https://www.flickr.com/photos/mauroescritor/6401139835/" data-wpel-link="external" target="_blank" rel="external noopener">Photo</a> by <a href="https://www.flickr.com/photos/mauroescritor/" data-wpel-link="external" target="_blank" rel="external noopener">Mauro Cateb</a>. Licensed under <a href="https://creativecommons.org/licenses/by/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By 2.0</a>.

Gemstone Certificates

Agate – Natural, Cabochon, Blue

Moss <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> pendant in 18k gold. © <a href="https://www.facebook.com/The-Parisian-Flea-138387306237391/" data-wpel-link="external" target="_blank" rel="external noopener">The Parisian Flea of Hampden</a>. Used with permission.

Agate Buying Guide

Agate – Natural, Cabochon, Brown

Bracelet with a dendritic <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> evoking a fall scene, with 8.5 mm <a href="https://www.gemsociety.org/article/natural-pearls-vs-cultured-pearls/" data-wpel-link="internal">cultured pearls</a>. © <a href="http://lindaallenjewelry.com" data-wpel-link="external" target="_blank" rel="external noopener">Linda Allen Jewelry</a>. Used with permission.

Agate – Natural, Cabochon, Orange

Dyed lace <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> in a pendant. Jewelry and <a href="https://www.flickr.com/photos/26538585@N02/3302141450/" data-wpel-link="external" target="_blank" rel="external noopener">photo</a> by <a href="https://www.flickr.com/photos/26538585@N02/" data-wpel-link="external" target="_blank" rel="external noopener">Lee</a>. Licensed under <a href="https://creativecommons.org/licenses/by-nd/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By-ND 2.0</a>.

Agate – Natural, Cabochon, Red

Dendritic <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> pendant, 1 3/4 inch diameter, accented with <a href="https://www.gemsociety.org/article/champagne-brown-diamond-buying-guide/" data-wpel-link="internal">cognac diamonds</a>. © <a href="http://lindaallenjewelry.com" data-wpel-link="external" target="_blank" rel="external noopener">Linda Allen Jewelry</a>. Used with permission.

Agate – Natural, Cabochon, White

Whether you're creating a simple gemstone accent or an exquisite design like this <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> cameo set in sterling silver, the tools and techniques needed for cabochon carving are the same. <a href="https://www.flickr.com/photos/knitsteel/10425319665/" data-wpel-link="external" target="_blank" rel="external noopener">Photo</a> by <a href="https://www.flickr.com/photos/knitsteel/" data-wpel-link="external" target="_blank" rel="external noopener">knitsteel</a>. Licensed under <a href="https://creativecommons.org/licenses/by-nd/2.0/legalcode" data-wpel-link="external" target="_blank" rel="external noopener">CC By-ND 2.0</a>.

Cabochon Carving Tools and Techniques

Agate – Natural, Carved, Blue

Banded <a href="https://www.gemsociety.org/article/agate-gem-information/">agate</a> is a common decorative stone, but creative jewelry designers can use it to create fanciful pieces. <a href="https://www.liveauctioneers.com/item/77648897_19th-c-french-gold-opal-agate-butterfly-brooch-pin">Photo</a> courtesy of <a href="http://liveauctioneers.com">liveauctioneers.com</a> and <a href="https://www.liveauctioneers.com/auctioneer/4708/hill-auction-gallery/">Hill Auction Gallery</a>.

How Does Quartz Form?

Agate – Natural, Carved, Brown

Thousands of gemstone pictures and names searchable by various criteria.

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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="https://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

Donald Clark, CSM founded the International Gem Society 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; Gemology 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="https://www.joelarem.com/">joelarem.com</a>

Joel E. Arem, Ph.D., FGA

Fatma Oya Borahan, GG, FGG has Graduate Gemologist and Diamond Diplomas from the Gemological Institute of America (GIA) the German Gemmological Association (DGemG) and Gemmological Association of Great Britain (GemA). <a href="http://birdamlasu.com/">birdamlasu.com</a>

Fatma Oya Borahan, GG, FGG

Barbara Smigel is a GIA Graduate Gemologist, faceter, jewelry designer, gem dealer, gemology instructor and creator of the well-regarded educational websites <a href="http://www.acstones.com">acstones.com</a> and <a href="http://www.bwsmigel.info">bwsmigel.info</a>.

Barbara Smigel, PhD. GG

Dr. Gerald Wykoff is GG (Graduate Gemologist), a CSM (Certified Supreme Master gemcutter), educator, and author of several gemology books. He founded the American Society of Gemcutters in the 1980s and served for more than 10 years as the editor of its monthly magazine, American Gemcutter.

Dr. Gerald Wykoff GG CSM

A geologist, environmental engineer and Caltech graduate, Addison&#8217;s interest in the mesmerizing and beautiful results of earth&#8217;s geological processes began in her elementary school&#8217;s environmental club. When she isn&#8217;t writing about gems and minerals, Addison spends winters studying ancient climates in Iceland and summers hiking the Colorado Rockies.

Addison Rice

The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as <a href="https://rockpeddler.com/product-category/instructional-materials/">Gram Faceting Designs</a>.

Jeff R. Graham

Kyrylo Gubariev, Graduate Gemologist (GG, AJP) is a gemologist with a passion for sharing his knowledge with fellow gem lovers. Originally from Ukraine, he is currently based in Bangkok, Thailand.

Kyrylo Gubariev, Graduate Gemologist (GG, AJP)

Jim Buday was born and raised in Wisconsin. He attended college for biology, but realized that he preferred to work with his hands. He became a general contractor and home flipper. Jim then taught himself to cut gems by watching instructional YouTube videos and reading online forums. By 2019, he was confident enough in his skills to pursue selling his work. He founded the Reddit thread, Shinypreciousgems, which now sits at more than 25,000 members. Jim now works with gems and jewelry full time, and has also partnered with several jewelers to offer settings to his gemstone clients. Recently, Jim started creating his own gem designs. In his free time, Jim enjoys the outdoors, working on his land, and is building a house with his girlfriend, Raeanna.