Gemmy, olive-green blades of Fayalite up to 1.5 mm on high-temperature Cristobalite nicely set in highly lustrous, jet-black obsidian.Very rare, older material from this uncommon locale, dating to the 1960s.Ex Francesco Bedognč collection.
Formula :
Fe22+[SiO4]
System: orthorhombic Hardness:7 Rarity:not common
Strunz id:VIII/A.4-20 -
SILICATES
Name origin: Named by Christian Gottlieb Gmelin in 1840 for the type locality, Faial Island (Fayal Island), Azores District (Azores Islands), Portugal.
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 Specimen weight:42 gr.
 Crystal size:Up to 1,5 mm
 Overall size: 40mm x 35 mm x 35 mm
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