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Bertrandite,Rhodochrosite, Quartz - Kara-Oba W deposit, Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan
(#:MINS8569)
Lovely crystals of white Bertrandite's crystals up to 1,6 cm long with minor rhodochrosite and quartz in association. Collected in the 90's. Former dr. Francesco Bedognè coll. with original label.
Formula :
Be
4
[(OH)
2
/Si
2
O_7_]
System:
orthorhombic
Hardness:
6-7
Rarity:
not common
Strunz id:VIII/C.7-10 - SILICATES
Name origin:
For Emile Bertrand (1844-1909) French mineralogist
Specimen weight:30 gr.
Crystal size:Up to 1,6 cm long
Overall size: 35mm x 32 mm x 20 mm
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