Crystals embedded and growing on surface, rhombdodecahedra (garnetohedra) icositetrahedra. Large crystals weighing several hundred kilograms are known. Aggregates massive granular to compact. Occurs in gneiss, micaschists, eclogite, in calcareous and dolomitic metamorphic rocks, frequently in sands. Rare in igneous rocks.
Garnet is the Birthstone for the month of January.
Our Garnet Rough from Africa.
Mineral Class: Silicates
Mineral Species: Nesosilicates
Composition: Garnet Group - a group of very closely related aluminum silicates (pyrope, almandine, and spessartine) and calcium silicates (grossular, andradite, and uvarovite)
Specific Gravity: 3.4-4.6
Fracture: Conchoidal, splintery, brittle
Color: Colorless/all colors except blue
Luster: Vitreous, greasy, resinous
Transparency: Transparent to opaque
Crystal System: Cubic
Sources: Europe, Alaska, Arizona, Idaho, New Mexico, Africa, Australia