Viimistulite

Viimistulite is a rare mineral belonging to the silicate group, specifically classified as a sorosilicate. It was first discovered in 1986 in the Viimsi quarry, Estonia, from which it derives its name. The mineral is typically found in contact metamorphic rocks, often associated with skarn deposits. Viimistulite is characterized by its unique crystal structure, which is monoclinic, and its distinctive color, ranging from light yellow to brownish yellow.

The chemical formula of viimistulite is Ca2Mg2Si2O7. It consists of calcium, magnesium, silicon, and oxygen, with the silicon and oxygen atoms forming a sorosilicate group. The mineral's hardness on the Mohs scale is approximately 5.5, making it relatively hard but still susceptible to scratching by harder materials. Viimistulite has a specific gravity of around 3.4, indicating its density relative to water.

Viimistulite is not commonly found in large quantities and is often collected by mineral enthusiasts for its rarity and aesthetic appeal. Its occurrence is limited to specific geological settings, which contributes to its status as a relatively obscure mineral. Despite its rarity, viimistulite remains an important subject of study for geologists and mineralogists, as it provides insights into the processes of contact metamorphism and the formation of skarn deposits.