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Spinels are hard, lustrous gemstones. Most of rough spinels show perfect octahedral crystal and sometimes, twins can be seen. Spinel comes variety range of colour base upon the colouring elements or impurities of this types of gemstone itself. The popular colour of spinel are fancy colour, pink colour and red colour.
SPECIFICATIONS OF SPINEL :
HARDNESS : 8 Mohs
SPECIFIC GRAVITY: 3.61 to 3.67
REFRACTIVE INDEX : 1.72 to 1.73
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Spinels |
