Fabianite
A colorless, transparent calcium borate-hydroxide that fluoresces — a monoclinic prismatic mineral.
Intro adapted from Wikipedia (CC BY-SA).
Fabianite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CaB₃O₅(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 6; specific gravity 2.77–2.8; optically biaxial.
IMA symbol Fbn, IMA status: approved, named in 1962.
Found in a marine evaporite deposit.
It is found associated with Halite, anhydrite, howlite, szaibélyite.
The mineral was named to honor Hans-Joachim Fabian, German geologist.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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