Gemstones Guide to Precious & Semi Precious Stones – Tagged "Ruby" – Page 2
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An Overview of Ruby

An Overview of Ruby

Ruby is a light pink to blood red gemstone, a variety of the mineral corundum (aluminium oxide). The common red color is caused mainly by the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. It is considered one of the four precious stones, together with the sapphire, the emerald and the diamond. Improvements used include color alteration, improving transparency by...

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