Jarandolite
Jarandolite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CaB₃O₄(OH)₃.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 6; specific gravity 2.49; White streak; Vitreous luster; optically biaxial.
IMA symbol Jdo, IMA status: approved, named in 1995.
Formed from abnormally highly saline water in a closed lacustrine basin of mixed volcanic tuffs and sedimentary clays and marls.
It is found associated with Colemanite, howlite, lüneburgite, montmorillonite, pentahydroborite, searlesite, studenitsite, ulexite, veatchite.
The name is derived from the locality, the Jarandol basin, that produced the first specimens.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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