Ettringite
Ettringite

Ettringite Value, Price, and Jewelry Information


Ettringite is not generally facetable. Any cut stone would be considered an extreme rarity.

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Ettringite is not generally facetable. Any cut stone would be considered an extreme rarity.

Ettringite
Ettringite crystal, 5.0 x 3.5 x 2.0 cm, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa. © Rob Lavinsky, www.iRocks.com. Used with permission.

Comments

South African material has yielded minute stones, some of which may have been labeled sturmanite.

Series to Sturmanite.

Sources

Ettringen, Germany: In tiny crystals.

Franklin, New Jersey: Minute crystals.

South Africa: Associated with sturmanite at the Jwaneng mine, near Hotazel. The sturmanite forms yellowish coatings, with ettringite cores.

Stone Sizes

Material from Ettringen and Franklin is microscopic. A 2.5 carat pale yellow ettringite was faceted from material found in the center of a mass of sturmanite from South Africa. This may be the largest known for the species.


Joel E. Arem, Ph.D., FGA

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. joelarem.com

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