An overview on Yugawaralite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Yugawaralite.
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|Is a Variety of||Zeolite|
|Crystallography||Monoclinicz crystals tabular and very flat.|
|Colors||Colorless to white.|
|Cleavage||Imperfect; very brittle.|
|Stone Sizes||Superb, Well-formed, colorless, transparent crystals up to 3 cm long occur at the Khandivali Quarry, Bombay, India, with physical properties close to the literature values for the mineral. A few colorless faceted gemstones have been cut from this exceptional and extremely rare material.|
|Formula||CaAl2Si6O16 · 4H2O.|
Optics: a=1.495; β= 1.497; γ=1:504.
Occurrence: In veins and crystals in volcanic rocks in Japan and in huge crystals in breccia cavities in India.
Yugawara Hot Spring, Kanagawa Prefecture, Japan.
Khandivali Quarry, near Bombay, India.
Alaska; Iceland; Sardinia; British Columbia.
Name: From the original Japanese locality.