Blue Sapphire Round 6mm gemstoneBlue Sapphire Round 6mm gemstone Descriptions Deep blue sapphires have long been associated with royalty, often worn by medieval kings who believed that the gemstones would protect them from their enemies. Besides nobility and a symbol of faithfulness, it was also believed that sapphires cured eye disease and protected wearers from evil. This listing include 1 STONE per order* Gemstone: Natural Sapphire Color: violet Blue Transparency: Transparent