100g Green Kyanite from Tanzania

Cobble Creek: 100g lot of Green Kyanite from Tanzania

Green colored Kyanite from Tanzania. A 100 gram lot will include 25 to 30 kyanite blades. If you're looking for less, check out our other listings for 10 gram or 50 gram lots.

Blades range from 1/2" to 1" blades included. Great for jewelry, wire wrapping, and or just adding to your collection.

Each order will be a random pull from our bulk supply.

From Wikipedia:
https://en.wikipedia.org/wiki/Kyanite

Kyanite is a typically blue aluminosilicate mineral, commonly found in aluminium-rich metamorphic pegmatites and/or sedimentary rock. Kyanite in metamorphic rocks generally indicates pressures higher than four kilobars. Although potentially stable at lower pressure and low temperature, the activity of water is usually high enough under such conditions that it is replaced by hydrous aluminosilicates such as muscovite, pyrophyllite, or kaolinite. Kyanite is also known as disthene, rhaeticite and cyanite.

Kyanite is a member of the aluminosilicate series, which also includes the polymorph andalusite and the polymorph sillimanite. Kyanite is strongly anisotropic, in that its hardness varies depending on its crystallographic direction. In kyanite, this anisotropism can be considered an identifying characteristic.

At temperatures above 1100 °C kyanite decomposes into mullite and vitreous silica via the following reaction: 3(Al2O3·SiO2) → 3Al2O3·2SiO2 + SiO2. This transformation results in an expansion.[4]

Its name comes from the same origin as that of the color cyan, being derived from the Ancient Greek word κύανος. This is generally rendered into English as kyanos or kuanos and means "dark blue".