Hall 3
Coloured Gemstone Jewellery, Stones, Coloured Gemstones, Emeralds, Sapphires, emeralds and rubies, Semi Precious Stones
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The gemstone known as spinel is actually one species in a group of related minerals known as the spinel subgroup. They are all isometric aluminum oxides with magnesium, iron, zinc, and traces of other elements. Some of the other minerals in the group are gahnite, galaxite, hercynite, and magnetite.