Grossular Garnet

Garnets are a common mineral found in many metamorphic rocks. It is also sometimes found in pegmatites dikes and as grains in sedimentary deposits. The name garnet comes from the Latin word granatus which means "like a grain" in reference to the crystal form. There are many types of garnets as the chemistry varies widely. Grossular garnet include a wide variety of colors including white, green, yellow, and pale pink. The name comes from grossularia, the botanical name for the Gooseberry because of the similar pale green color of the first grossular garnets. Other types of garnets are: andradite, almandine, pyrope, spessartine, and uvarovite.

Chemical Formula:

Fe3Al2Si3O12

Mineral Class:

Nesosilicate

Crystal System:

Isometric

Symmetry:

4/m -3 2/m

Hardness:

6.5-7.5

Specific Gravity:

4.32

Cleavage:

None

Fracture:

Conchoidal

Color:

White, green, yellow, pale pink

Streak:

White

Luster:

Vitreous, resinous

Transparency:

Transparent/translucent

Common Habits:

Granular

Other Properties:

Notable Localities:

Wrangel, Alaska; Germany; Norway; India

Uses:

Cut as a gemstone, abrasives

Associated Minerals:

Diopside, vesuvianite, quartz, epidote, albite

Specimens:


Grossular Garnet
Chihuahua, Mexico


Grossular Garnet
Quebec, Canada