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40 - Braunite ( (Rol)
Lawsonite var. Chromian Lawsonite - Cape Marmari - Grammata Bay - Syros Island - Cyclade Island - Kykládes Pref. - Aegean Islands deptm. - Greece
(#:MINS8976)
Several dark green crystals of this rare sorosilicate are spread over the surface of this specimen. The unusual green colour is due because it's the 'Chromian' variety of lawsonite.
Formula :
CaAl
2
[(OH)
2
/Si
2
O
7
] * H
2
O
System:
orthorhombic
Hardness:
6
Rarity:
not common
Strunz id:VIII/C.10-10 - SILICATES
Name origin:
For geologist Andrew Cowper Lawson (1861-1952)
Specimen weight:40 gr.
Crystal size:mm. 5
Overall size: 35mm x 25 mm x 20 mm
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