Colorless and white crystal aggregates of the very rare Ca borate mineral korzhinskite from the type and only known locality worldwide: Novofrolovskoye Deposit, Turjinsk, Turya River, Krasnotur'insk, Sverdlovsk Oblast, Russian Federation. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY 4.0
Korzhinskite
Korzhinskite is an IMA-recognized mineral species in the borate class, with the chemical formula CaB₂O₄·0.5H₂O.
Key properties: optically biaxial.
IMA symbol Kzh, IMA status: approved, named in 1963.
Found in boron-rich iron-ore skarn.
It is found associated with Andradite–grossular, dolomite, calcite, sibirskite, calciborite.
The mineral was named to honor Dmitrii Sergeevich Korzhinskii (1899–1985), Russian petrologist, Institute of Geology of Ore Deposits, Petrology, Mineralogy, and Geochemistry, Moscow, Russia.