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Cat's Eye Sillimanite

Sillimanite is an aluminum silicate, related to both andalusite and kyanite. In fact these three minerals are polymorphs - they share the same chemical composition but different crystal structures.

Sillimanite is named after the American chemist Benjamin Silliman (1779-1864). Silliman was one of the first American professors of science and taught at Yale University.
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I'd say that the information in the descriptions is rather sparse, and the state of the gems/their color treatment or lack thereof is vague and unimpressive. Nevertheless they've got a great variety of offerings. The only area I can see that they could improve is in turquoise, which could include unstabilised cabs or at least specific names relative to their mines as opposed to appearances. Thanks
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Great delivery and awesome products. Love the stones and selections. Website is fantastic especially for a novice.Thanks so much.
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I purchased another kyanite'the intense color saturation of this stone is incredible. The quality was as described and pictured in the photos. Always happy with my purchases!
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length x width x depth,
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