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SPECIES: NATURAL CORUNDUM
VARIETY: SAPPHIRE
SHAPE: PEAR MIXED CUT
COLOUR: DEEP BLUE, TRANSPARENT
WEIGHT: 0,80 CT
DIMENSION: 7,08 X 5,05 X 2,84 MM
CERTIFICATE: IGI 515209036
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The origin of the word corundum is attributed to the ancient Sanskrit "kuruvinda" whose meaning would be "very hard stone". Corundum crystallizes in the trigonal system, its crystalline habit is prismatic or bipyramidal. This is an allochromatic mineral, that is, if it is found pure, it is colorless. Its chemical composition derives from aluminum oxides (Al2O3). For example, in green corundum, the causal elements are iron-titanium charge transfers and the presence of chromium.
