Chocolate dogtooth calcite, small Sandstone Approx weight: 12–20g (Option A

Approx weight: 12–20g (Option A about 30g)

but faces are inset with raised edges

Locality: Northern Morocco

On other specimens the purple ends appear to have cubic forms

The coffee-brown staining may be iron

Chocolate dogtooth calcite, small Sandstone Approx weight: 12–20g (Option ALocale: Santa Eulalia, Chihuahua, Mexico Approx size: 22. 5" Approx weight: 45120g Known by the trade name "chocolate dogtooth calcite," this type of calcite from the famed Santa Eulalia mining district grows in hedgehog clusters of sharp dogtooth (scalenohedral) crystals. The variety gets its distinctive opaque dark brown appearance from iron oxides; a layer of hematite included calcite is deposited on the surface during a later phase of growth.