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Charlesite - N'Chwaning II Mine - Kuruman - North Cape - South Africa (#:MINS8129)

Specimen with bright, clear Yellow crystals of Charlesite on minor matrix.A rare specimen of Ettringite Group.

Formula :
Ca6(Al,Si)2[(O,OH)12/B(OH)4/(SO4)2] * 26 H2O
System: hexagonal Hardness:2½ Rarity:very rare
Strunz id:VI/D.13-40 - SULFATES, CHROMATES, MOLYBDATES and TUNGSTATES
Name origin: For Dr. Charles Palache, (1869-1954) Harvard University mineralogist

Specimen weight:6 gr.
Crystal size:Up to 1,8 cm wide
Overall size: 20mm x 12 mm x 29 mm

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Charlesite - N'Chwaning II Mine - Kuruman - North Cape - South Africa

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