sapphire (gem)

Sapphire is a gemstone, a variety of corundum (aluminium oxide) which usually has an impurity of iron and titanium which gives it a deep blue colour. It is used for jewelry, but pure colourless sapphire is sometimes used as glass.

This tag implicates gem (learn more).

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post #5195124
↑6♥7C0S
post #5194875
↑20♥23C2S
post #5176848
↑8♥4C2S
post #5176802
↑21♥17C0S