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Osumilite - Funtanafigu Quarry, Marrubiu, Mt. Arci, Oristano Province, Sardinia, Italy
(#:MINS8537)
Cluster of shiny blacks tabular Osumilite crystals up to 2.5 mm richly set on contrasting matrix.Ex Francesco Bedognè coll. with label.
Formula :
(K,Na)(Fe
2+
,Mg)
2
(Al,Fe
3+
)3[Si
12
O
30
]
System:
hexagonal
Hardness:
6-7
Rarity:
not common
Strunz id:VIII/E.22-90 - SILICATES
Name origin:
Named in 1953 by Akiho Miyashiro for the Osumi Peninsula, Japan, on which the type locality is found.-
Specimen weight:192 gr.
Crystal size:Up to 2.5 mm
Overall size: 78mm x 55 mm x 34 mm
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