GeologyRocks

A cubic mineral of the general form of:

A₃²⁺B₂³⁺Si₃O₁₂

A can be magnesium, iron, manganese or calcium, B is iron or aluminium (occasionally chromium). Commonly found in metamorphic and occasionally igneous rocks.

The above garnets (red) are in a mica schist. More infoformation can be found here.

These Almandine garnets clearly show the form that garnets can take.