One of the most valuable gemstones on earth, ruby is regarded as the stone of passionate love. From the corundum family, the red variety being ruby and the blue, sapphire. With the exception of the diamond, corundum is the hardest of the gemstones on the Mohs scale scoring a 9. Ruby is derived from the Latin "Ruber" meaning red. It has long symbolised eternal devotion and romantic love.
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