Oyelite

oyelite

xonotlite

vesuvianite

scawtite

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Formula: Ca5BSi4O13(OH)3.4H2O
Phyllosilicate (sheet silicate), borosilicate
Crystal System: Triclinic
Specific gravity: 2.62 measured
Hardness: 5
Streak: White
Colour: White, pale tan
Common impurities: Al,Na,C
Environments

Metamorphic environments
Hydrothermal environments

Oyelite is a hydrothermal mineral in late-stage assemblages of several geological origins (HOM).

Localities

At Suisho-dani, Ise City, Mie Prefecture, Japan, oyelite occurs in rodingite embedded in serpentinite (HOM).

At the type locality, the Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan, oyelite occurs in a vein cutting a spurrite zone of a spurrite-gehlenite skarn (Webmin). Associated minerals include xonotlite, vesuvianite, spurrite, scawtite, quartz, hillebrandite, gehlenite, garnet, foshagite, calcite, bultfonteinite and bicchulite (Mindat).

At the Bazhenovsk deposit, Asbest, Sverdlovsk Oblast, Russia, oyelite occurs in rodingite formed by low-grade metamorphism of gabbro dikes embedded in serpentinites. Associated minerals include tatarinovite, pectolite, xonotlite, calcite, grossular and diopside (HOM).

At the N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape, South Africa, exceptional specimens of oyelite occur in strata-bound manganese ores in metamorphosed volcanogenic-sedimentary rocks. Associated minerals include charlesite, bultfonteinite, rhodochrosite and hausmannite (HOM).

At the Crestmore quarries, Crestmore, Riverside county, California, USA, oyelite occurs in skarns (HOM).

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