Borcarite
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Charcas, San Luis Potosi, Mexico
2926
Choice specimen from a recent find in Mexico of this rare borate. The monoclinic crystals are well formed and exhibit an exceptional transparent sky-blue colour.
Formula: Ca4Mg(B4O6(OH6)(CO3)2
Status: Sold
Dimensions: 38x23x15mm
Size: Miniature (M)
Barite pseudomorph after Alstonite
The Mineral World of John Ruskin
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