axinite

Axinite is a rare mineral belonging to the garnet group, with the chemical formula Ca2Al3(SiO4)(Si2O7)O(OH). It is typically found in metamorphic rocks, particularly those that have undergone contact or regional metamorphism. Axinite is known for its distinctive prismatic crystals, which can be elongated and often exhibit a striated or zoned appearance. The mineral is typically colorless or white, but it can also occur in shades of gray, brown, or green due to the presence of impurities.

Axinite is named after its type locality, the Ax River in the Ural Mountains of Russia. It was first described in 1832 by the German mineralogist Gustav Rose. The mineral is relatively soft, with a Mohs hardness of 6.5 to 7, and has a specific gravity ranging from 3.2 to 3.4. It is typically translucent to transparent, with a vitreous or pearly luster.

Axinite is not commonly used in jewelry due to its rarity and the fact that it is often found in small, imperfect crystals. However, it is occasionally used as a gemstone, particularly in the form of cabochons or faceted stones. The mineral is also of interest to collectors and mineralogists due to its unique crystal habit and the variety of colors it can exhibit.