The famous blue gemstone associated with royalty is sapphire. Sapphires belong to the corundum mineral family and are most commonly recognized in their striking blue color, though they can actually be found in various colors, excluding red (which is classified as ruby). This gemstone has been prized for centuries, both for its beauty and its alleged protective properties. Historically, sapphires have adorned crowns, jewelry, and religious artifacts, symbolizing wisdom, loyalty, and nobility. Their durability makes them suitable for everyday wear, adding to their appeal among those seeking luxurious and timeless jewelry.