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Columbite-(Fe) - Analalava District, Sofia Region, Mahajanga (Majunga) Province, Madagascar
(#:MINS9211)
Interesting specimen with black metallic columbite crystals up to 3,0 cm long.
Formula :
Fe
2+
Nb
2
O
6
System:
orthorhombic
Hardness:
6
Rarity:
not common
Strunz id:IV/D.18-30 - OXIDES and HYDROXIDES
Name origin:
From the ferrum (iron) content and Columbia, for America, the source of the first specimens.
Specimen weight:205 gr.
Crystal size:Up to 3,0 cm tall
Overall size: 40mm x 40 mm x 48 mm
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2-(MI) - Miniature (Max 5.0 cm)
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