Kurumsakite is a mineral that belongs to the carbonate group. It is specifically classified as a rare copper carbonate mineral, typically occurring in oxidized porphyry copper deposits. The name "kurumsakite" is derived from its type locality, the Kurumsak mine in Kazakhstan.
Chemically, kurumsakite is composed of copper, carbon, and oxygen. It has a chemical formula of (Cu,Zn)8Al(SO4)2(OH)18·nH2O, where n represents variable water content. The mineral occurs in a triclinic crystal system and is characterized by its rich green to blue-green color, which can vary in intensity. It exhibits a vitreous to dull luster on its surfaces.
Kurumsakite can be identified by its distinctive crystal habit, which typically forms as acicular, fibrous, or radiating aggregates. It may also occur as crusts or botryoidal masses. The mineral has a Mohs hardness between 3 and 4, indicating its average hardness compared to other minerals.
Although kurumsakite is relatively uncommon, it is of interest to mineral collectors due to its unique color and crystal growth. Its occurrence is associated with secondary copper mineralization in the oxidation zones of copper deposits. Notably, kurumsakite often forms alongside other copper minerals like malachite, azurite, chrysocolla, and brochantite.
In summary, kurumsakite is a rare copper carbonate mineral found in oxidized porphyry copper deposits. It exhibits a green to blue-green color, forming acicular or fibrous crystal aggregates. Collectors value kurumsakite for its unique appearance and association with other copper minerals.
