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Formula: CaB2O4
Anhydrous diborate
Crystal System: Orthorhombic
Specific gravity: 2.878 measured, 2.88 calculated
Hardness: 3½
Streak: White
Colour: Colourless to white
Luminescence: Bright green cathodoluminescence
Solubility: Insoluble in water, readily soluble in acids
Environments
Localities
At the type locality, the Novofrolovskoye B-Cu deposit, Tur'insk, Turya river, Turinsk-Auerbakovsk ore field,
Serovsky District, Sverdlovsk Oblast, Russia, calciborite was found in deep drill cores at the contact of
limestone with quartz
diorite in a copper deposit
of the skarn type. It occurs as prismatic crystals to 1.5 cm,
associated with sibirskite,
calcite and dolomite, with minor
amounts of garnet, magnetite and
pyroxene. It also fills fissures in
limestone and was observed to replace
calcite
(AM 41.815, Mindat).
Calciborite has also been found at this locality in association with
formicaite
(AM 85.1322).
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