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About Cassiterite

Cassiterite is a tin oxide mineral, and is the primary ore for tin. In addition to its important industrial use, it has some interesting properties that make high quality crystals valuable as gemstones. Cassiterite is reasonably hard, with a rating on the Mohs scale of 6 to 7. It tends to be opaque though thin crystals can be translucent. Its chief virtue is its multiple crystal faces and outstanding luster. Many specimens are graded as having "adamantine" (diamond-like) or submetallic luster.

Cassiterite is one of the densest gem materials known. It also has a very high refractive index, higher than zircon, sphene and demantoid garnet.

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综合评分 -> 9

Site was recommended to me by my gemology professor. Based on what I’ve seen gemselect offers good quality stones for a large range of prices

发布者 Lynn in April, 2021

来源: Bizrate

综合评分 -> 10

Ive been shopping here many times before, so navigating around was easy. I am accustomed to the quality of the items and that's the main reason I come here. When I need non heated stones I know I can count on GemSelect being authentic. I trust them because I double check their quality. And never had problems with them. And yes I do recommend shopping there to some of my clients who are "less knowledgable" of industry. GemSelect is so user friendly they're great for beginner gem shoppers!

发布者 Konstantin Marchenko in April, 2021

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综合评分 -> 10

All has been great so far, now to wait and hopefully the items are what are expected.

发布者 Bek in April, 2021

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综合评分 -> 10

Well fell in love with the site right away ordered two many items I knew I would return a few. Decided I wanted to invest in a sapphire emerald or ruby after more research. The diamonds that I received we just stuck together just ordered one more I will have 10 in all diamonds two yellow six white. I'm so very happy I didn't know what I was going to keep and definitely diamonds were winner.

发布者 Kaitlin m in April, 2021

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综合评分 -> 9

good choice and quaity, would pass on info to others

发布者 Hunstman in April, 2021

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综合评分 -> 9

I like quality, selection, no charge tax and good shipping.

发布者 Thea in April, 2021

来源: Bizrate

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