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Fayalite on Cristobalite
Amygdaloidal obsidian is the matrix for an open "egg" of light gray, cristobalite (a tetragonal polymorph of quartz) which lines the inside. Perched aesthetically inside the cristobalite vug is a gemmy, yellow-green crystal, 0.2 cm across, of fayalite. This is an end member of the olivine group, of which, the most famous member is forsterite var. peridot. But you even more seldom see nice sharp (gemmy!) fayalites.
Unknown Owner
Product details
Species
SizeSmall Cabinet
Dimensions6.0 x 4.9 x 4.1 cm
Locality
Little Lake, California, USA
Added on10/23/2024
Comments
Known provenance
2024/08
Unknown Owner
Not disclosed—Species and Locality Wiki Pages
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