The gemstone sapphire is primarily known for its rich blue color, though it can also be found in a variety of other colors, excluding red (which is classified as ruby). The blue hue of sapphires comes from the presence of iron and titanium in its crystalline structure. Sapphires are highly valued for their beauty, durability, and brilliance, making them a popular choice for jewelry, including engagement rings and earrings. Originating from the corundum mineral family, sapphires are one of the hardest natural gemstones, rated a 9 on the Mohs scale. Their captivating colors and rarity contribute to their status as a coveted gemstone worldwide.