Rock Gemstones

Rock Gemstones

Deep within the earth, molten rock and gasses continually move against the earth's crust. It is within this extremely high pressure and heat that diamonds and peridot are formed. Diamonds begin to crystallize in the magma 109 to 149 miles beneath the earth's surface, and peridots are formed 20 to 55 miles below. As the earth's crust continually moves, these deposits begin to work their way toward the surface.

Generally, gemstones are classified through four processes, although some gemstones undergo more than one process in their formation.

1. Molten rock, fluids, and gasses
2. Environmental changes
3. Surface water
4. Formation in the earth's mantle

Rock Gemstones