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Callaghanite - Sierra Magnesite Mine, Gabbs, Gabbs Mining District, Nye Co., Nevada, USA(Type Locality)
(#:MINS8368)
Very colorful intense lustrous rich deep blue Callaghanite in sub millimetric crystals richly covering the dark matrix.
A nice sample of this rare copper magnesium carbonate.Ex
Francesco Bedognè
coll. #290.
Formula :
Cu
2
Mg
2
[(OH)
6
/CO
3
] * 2 H
2
O
System:
monoclinic
Hardness:
3-3½
Rarity:
rare
Strunz id:5/E.07-10 - 5 : Nitrates, Carbonates & Borates
Name origin:
Honors Dr. Eugene Callaghan (1904–1990), Director of the New Mexico Bureau of Mines, Socorro, New Mexico, USA, for his work on magnesite deposits.
Specimen weight:33 gr.
Crystal size:sub-mm xls
Overall size: 30mm x 32 mm x 29 mm
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