reunalaite

Reunalaite is a rare mineral discovered in 2005 in the Reunala mine in Finland. It is a complex borate mineral with the chemical formula (Na,K)2Ca2B8O13Cl·H2O. The mineral is named after the Reunala mine where it was first found. Reunalaite crystallizes in the monoclinic crystal system and typically forms prismatic crystals. It is usually colorless or white, but can also be found in shades of blue, green, or yellow due to impurities. The mineral has a Mohs hardness of 4.5 to 5 and a specific gravity of approximately 2.7. Reunalaite is often found in association with other borate minerals such as ulexite and boracite. It is a relatively rare mineral and is primarily of interest to mineral collectors and researchers studying borate minerals. The mineral's discovery has contributed to the understanding of the geological processes that form borate minerals in volcanic environments.