San Bartolo Mine, Charcas, Charcas Municipality, San Luis PotosÃ, Mexico
Thumbnail - 2.3 x 1.5 x 1.8 cm
4.9 grams
Specimen status: Available
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Blue borcarite in crystals to a few
mm, on matrix. Borcarite is a globally rare calcium
magnesium borate carbonate - Ca4 Mg[B 4 O 6 (OH) 6 ](CO 3 ) 2 ,
for which Mindat lists just eight confirmed
localities. Best appreciated under magnification:
hand lens, microscope or camera.
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