The gemstone Garnet is the official birthstone for January as adopted by the American National Association of Jewelers in 1912. It is also the stone for the Zodiac sign Aquarius.

Garnet may be given as a gem on the 2nd and 6th wedding anniversary.

Garnet occurs in every color except blue and most varieties are named for their color. Rhodolite is a purplish red, hessonite is the name for an orange, cinnamon, or pinkish variety. Tsavorite is the name given to dark green grossularite. Uvarovite and demantoid are also green varieties.

Pyrope garnets are purplish red, orangy red, crimson, or dark red. Spessartite garnets range from yellow and orange through red to reddish brown to dark black/brown. Color change garnets exhibit a "alexandrite-like" effect when viewed in natural light or artificial lighting.

Garnets range from a 7.0 to 7.5 on the Mohs scale of hardness and are found in the U.S. (Arizona), South Africa, Argentina, Australia, Brazil, Myanmar (Burma), Scotland, Switzerland and Tanzania . Garnets are formed when high temperatures and/or pressure is a factor and geologists often use garnets as a gauge of the amount of temperature and pressure that was present during their formation.