Skarn

About it

Coarse rock of calcium silicates such as garnet, diopside, epidote, and wollastonite, formed where hot fluids from granite reacted with limestone. Often hosts tungsten, copper, or iron ores and fine garnet and epidote crystals.

Type

Rock (metamorphic)

Group

Metamorphic (contact)

Colours

green, brown, red-brown, grey, multicoloured

Transparency

opaque

Typical values: real specimens vary. For more, see mindat.org.