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.

Certified Customer Reviews

Overall Rating -> 10

I've been looking for precut gems like this for a while and found exactly what I wanted. I will definitely be ordering again. I would recommend GemSelect to others making jewelery.

Posted By Kayla in April, 2021

Source: Bizrate

Overall Rating -> 10

Shipping was extremely expensive for the size of items.

Posted By Preston in April, 2021

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Overall Rating -> 10

The software behind the GemSelect experience is very user friendly!

Posted By Katerina in December, 2020

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Overall Rating -> 10

I bought my stones and designed my jewelry myself, starting with my stone selection. They are my grandchildren birth stones that I will pass to them later. They are part of me then I will be part of them. Something I created with love for them.

Posted By Grandmother in March, 2021

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Overall Rating -> 9

Well packed. It was dropped with rest of the mail. Luckily I got. But was delivered without signature.

Posted By Gopal in December, 2020

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Overall Rating -> 8

The experience was good, fast and smooth

Posted By Roge0964 in May, 2021

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Overall Rating -> 9

I purchased a stone as a gift for my wife. I'm waiting to see how soon I get it and how well it matches the description on the web site. Future orders may follow based on the overall experience of this one.

Posted By Mike in February, 2021

Source: Bizrate

Overall Rating -> 10

I like that they have lots of gemstones, I would like to see a mixed lot. It would be nice if I could get a mixed lot of gemstones.

Posted By Kasey in April, 2021

Source: Bizrate

Overall Rating -> 10

I love this site, the gems are of good quality. I learned about this site from Ms. Blue and use it to get quality crystals.

Posted By Chasitie in February, 2021

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Overall Rating -> 9

I've talked about buying Gems from Gemselect to my co-Workers. I also wanted to find out about Gemselect so I made a small purchase. I will be making bigger purchases in the future.

Posted By Riverrats32 in October, 2020

Source: Bizrate

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