Cristobalite
Origin: Bellerberg quarry, Laacher See, Rheinland-Palatinate, Gernany
Owner: Lou Perloff
Microscopic image
Cristobalite in obsidian (volcanic glass)
Origin: Cerro San Cristobal, Pachuca, Hidalgo, Mexico
Owner: Lou Perloff
Microscopic image
Photo-Atlas
of Minerals
Origin: Coso Hot Springs, Inyo Co., California, U.S.A.
Owner: Milton Speckels
Microscopic image, 2.9 x
Photo-Atlas
of Minerals
Origin: Ronneburg U deposit, Gera district, Thuringia, Germany
Picture size: 2 mm
Owner: Thomas Witzke
Chalcedony-like parts of cristobalite variety lussatite on a bitumen-rich
matrix
Origin: Puy de Dome, France
Sample size: 5 x 6 cm
Origin: Ngangatah, New Zealand
Sample size: unknown
Sample owner: Steve Sorrell
Origin: Takli, Ahmednagar, Maharashtra, India
Ex. Marty Lewadny collection
Sample size: 14.6 x 7.5 x 7.2 cm
Obsidian(volcanic glass) cools too quickly, to crystallize. Thus, it is
unusual to see minerals attached. The spheres of high temperature
cristobalite (SiO2) are actually the result of devitrification,
or loss of silica from the obsidian.
Origin: Cougar Butte, Siskiyou, California, U.S.A.
Ex. Marty Zinn collection
Sample size: 5.9 x 3.8 x 3.8 cm (top), 6 x 5.9 x 2.5 cm (2nd row), 6 x 5.4 x
2.5 cm (bottom)
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