indumatis

Indumatis is a rare and distinctive mineral species, first discovered in the late 19th century. It is named after the Latin word "induma," meaning "cloak," reflecting its distinctive, cloak-like crystal habit. Indumatis is typically found in the form of thin, tabular crystals that often exhibit a translucent to transparent appearance. The mineral is usually colorless or white, but can also occur in shades of gray, yellow, or brown due to impurities.

Indumatis is primarily composed of silicon dioxide (SiO2), similar to other silica minerals such as quartz and opal. It crystallizes in the monoclinic system and is often associated with other silica minerals like opal and chalcedony. The mineral is typically found in hydrothermal veins and cavities, often in association with quartz and other silica-rich minerals.

Indumatis has a Mohs hardness of approximately 6.5, making it relatively soft and susceptible to scratching. Its specific gravity is around 2.2, indicating it is lighter than many other minerals. The mineral is not known to have any significant economic value, but it is appreciated by collectors for its unique crystal habit and aesthetic appeal.

Indumatis is relatively rare and is known to occur in only a few locations worldwide. Notable occurrences include the type locality in the Czech Republic, as well as in Brazil and the United States. Despite its rarity, indumatis remains an interesting and distinctive mineral species, valued by collectors and mineral enthusiasts alike.