Specific gravity: 2.19 to 2.23
Hardness: 3½ to 4
Colour: Colourless, white
At the Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan, olshanskyite is formed by alteration of nifontovite and some other anhydrous borates, near gehlenite-spurrite skarn. Associated minerals include nifontovite, frolovite, pentahydroborite, takedaite, sibirskite, parasibirskite, borcarite, bultfonteinite and calcite (HOM).
At the type locality, the Titovskoe B deposit, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Sakha Republic, Russia, olshanskyite occurs in magnesian skarn, as transverse-fibrous aggregates of polysynthetically twinned crystals, 0.02-0.03 mm in size. Associated minerals include sakhaite, szaibelyite, calcite, limonite, and quartz (HOM, mindat).
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