Chocolate dogtooth calcite, large Ferruginous quartz Approx weight: 71g

Approx weight: 71g

Another is tipped with metallic radial growth

specimens may stain surfaces or leave residue when handled

brittle crust which may make them susceptible to fracturing as part of normal geological processes

Approx dimensions: 2 x 1 x

Chocolate dogtooth calcite, large Ferruginous quartz Approx weight: 71gLocale: Santa Eulalia, Chihuahua, Mexico Approx size: 3. 75 x 2. 25 x 2. 25" Approx weight: 485g (about 1 lb) 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 brown appearance from iron oxides; a layer of hematite included calcite is deposited on the surface during a later