This natural Brown Cassiterite originates from Australia and its weight is about 5 carats. The measurements are 9.86mm x 6.05mm x 4.06mm (length x width x depth). The shape/cut-style of this Cassiterite is Octagon Facet. This 4.5ct Cassiterite gem is available to order and can be shipped anywhere in the world. Gemstone Certification can also be provided as an optional service.
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.
I will DEFINITELY bookmark this page. Would happily buy from you again. When I got the sapphires, I thought they looked small compared to what I was expecting, but when I took them to a jeweler, they weighed them and they were the exact carat size that GemSelect had reported them to be.
I both several times and whit different shippment in GemSelect and always is perfect, easy, the gems are like the photo and arrieved in time. A pleasure to buy here any time!!!! my preferite site, the only one!!!!Laura, Argentina