Wehrlite: The Rare Mineral with Unique Properties

Wehrlite is a rare mineral, with the chemical formula Ca2Mg5Si8O24(OH)2. It was discovered in 1963 by German mineralogist Gerhard Wehrli, hence its name. It is found in hydrothermal veins and pegmatites, typically associated with quartz, topaz, and tourmaline.

Wehrlite has a complex crystal structure, consisting of alternating layers of silicate tetrahedra and octahedra. It is a member of the amphibole group of minerals, which also includes hornblende and biotite. Wehrlite is usually found in small crystals, up to 1 cm in size, and its color ranges from pale yellow to orange-brown.

Wehrlite has a high refractive index and is optically birefringent, meaning that it exhibits different indices of refraction for light polarized in different directions. This property makes it useful as an optical material, particularly in the production of optical fibers.

Overall, wehrlite is a rare and interesting mineral that is prized by collectors for its unique properties and distinctive appearance.