The famous gemstone sapphire typically comes in a rich blue color, although it can actually be found in a variety of hues, including yellow, pink, and green. The iconic blue color is attributed to the presence of iron and titanium in the crystal structure of the mineral corundum. Sapphires are highly valued for their beauty and durability, making them a popular choice for jewelry, particularly engagement rings. Additionally, the term "sapphire" can refer to the blue variant specifically, while other colored corundum stones are referred to as "fancy sapphires." Their allure and significance have made sapphires a symbol of nobility and divine favor throughout history.