As a mutable sign, Sagittarius is linked with the fire element, with its ruling planet being Jupiter. Some other Sagittarius Birthstones that help Sagittarians grow and evolve are turquoise, blue topaz, and amethyst. We will be discussing the uses and benefits of each of these Sagittarius birthstones, but first, let us find out the meaning and history of the Sagittarius zodiac sign.