Rare and beautiful emerald has long been regarded as a superior stone since ancient times. In all its stunning lush green richness, it is the birthstone of May and known as ‘The Jewel of Kings’. Cleopatra wore it as a symbol of her status and power. In ancient Greece and Rome,"emerald"was said to be the gemstone of the goddess"Venus, purveyor of love and hope. Given as a gift for a 55th wedding anniversary. Mohs scale of mineral hardness: 7.5 - 8