Did you know that sapphire is the second-hardest mineral, just behind diamond? This hardness coupled with their gorgeous sparkling blue color makes sapphires a stunning choice for jewelry. Sapphire gemstones are typically a rich blue color. The ancients believed that the earth rested on a giant sapphire and its reflection gave the sky its blue color. Though blue is the most common sapphire color, other colors exist including pink, white, and red (which are rubies). Sapphire is the birthstone of September, making sapphire jewelry a natural choice for celebrating September birthdays.