Precious gemstones of ruby (red) and garnet (pink). Gemstones are solid crystalline substances (minerals), formed by natural processes, which are priz

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Precious gemstones of ruby (red) and garnet (pink). Gemstones are solid crystalline substances (minerals), formed by natural processes, which are prized by collectors and used in jewellery. Cut and polished stones utilize the refraction of light to enhance their appearance. Ruby is a red variety of corundum (aluminium oxide). Garnet is a group of relatively common minerals, in a wide variety of colours, that can be used as gems.

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Keywords: aluminium, corundum, cut, earth, garnet, garnets, gem, gems, gemstone, gemstones, geology, mineral, multiple, natural, oxide, polished, precious, rubies, ruby, scattered, science, stone, stones, valuable