Sapphire (other colors)

Except for the blue color, sapphire comes in a variety of almost all colors ( pink, purple, green, orange, yellow,… and even colorless). The heat treatment is a technique of enhancement which is very common. It is unusual to find sapphires which have not undergone heat treatment. Their value is therefore much more important. Hardness 9 on the Mohs scale. Chemical composition Al2O3.

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