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Ganophyllite - Molinello Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy
(#:MINS8274)
Interesting specimen fully covered by creamy lamellar aggregates of ganophyllite to 2 mm in diameter on rhodonite matrix. Uncommon specie and classic specimen from the Mn district of Liguria.
Formula :
(K,Na,Ca)
2
(Mn
2+
,Al,Mg)
8
[(OH)
7
/((Si,Al)
4
O
10
)
3
] * 8 H
2
O
System:
monoclinic
Hardness:
4-4½
Rarity:
rare
Strunz id:VIII/H.17-60 - SILICATES
Name origin:
Named in 1890 by Axel Hamberg from the Greek γανωμα for "brilliance or luster" and φύλλον for "leaf," in allusion to the high luster on platy cleavage surfaces.
Specimen weight:81 gr.
Crystal size:up to 2 mm
Overall size: 45mm x 40 mm x 28 mm
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