Yugawaralite Value, Price, and Jewelry Information


Yugawaralite
By Chris857 (Own work) [CC-BY-SA-3.0], via Wikimedia Commons

An overview on Yugawaralite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Yugawaralite.

Yugawaralite Value

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Yugawaralite Information

DataValue
NameYugawaralite
Is a Variety ofZeolite
Crystallography Monoclinicz crystals tabular and very flat.
Colors Colorless to white.
Luster Vitreous.
Fracture Very brittle.
Hardness 4.5.
Specific Gravity 2.23-2.25.
Birefringence 0.009.
Cleavage Imperfect.
Stone SizesSuperb, 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.
Luminescence None reported.
Spectral None.
FormulaCaAl2Si6O16 · 4H2O.
Pleochroism None.

Optics: a=1.495; β= 1.497; γ=1:504.

Biaxial (+).

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.