Cavansite a new gem material

Last Updated: 20th Apr 2017

At a recent gem and mineral show, I discovered a cache of cabochon cut Cavansite gems. They had a good polish and a deep royal blue coloration. This struck me as quite unique as I always considered this mineral to be too acicular and unconsolidated to be cut en cabochon. Apparently some brave cutters in India have succeeded in cutting solid cabs of this , and in some there is a vague chatoyancy but not oriented in any way. They are probably nodules that popped out of matrix while trimming, as this is a brittle mineral that isn't that well bonded to it's matrix in many cases. In any event, I think we need to add this unsusual, and might I say, relatively rare cut gem, to the lists of known cut gems on Gemdat.org, so that other collectors of unusual gems can be aware of this possibility. As of this time, I can be contacted by interested parties and I can probably access more cabochons of this mineral for their collections. It was priced at $25 U.S a carat, which is not out of line for an unusual gem material.




Article has been viewed at least 19 times.

Comments

In order to leave comments to this article, you must be registered
Copyright © Jolyon & Katya Ralph 1993-2017. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.