Pink gemstones
Hardness. Specific Gravity.
Beryl 7-3/4 2.709-2.810 Diamond 10 3.502-3.564 Ruby 9 4.073-4.080 Spinel 8 3.614-3.654 Topaz (“burnt” or “pinked”), 8 3.500-3.520 Tourmaline 7-1/4 3.024
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Color is one of the most wonderful effects in nature. It is an attribute of light and is not a part of the object which appears to be coloured; though all objects, by their chemical or physical composition, determine the number and variety of vibrations passed on or returned to the eye, thus fixing their [...] |
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