Chocolate dogtooth calcite, large Stalactitic chalcedony or spots under magnification (you

or spots under magnification (you can see it if you zoom in on close shots

some with a smoky-quartz tint

(If you want more than one set

has the mercedes termination and glossy high luster characteristic of the Erongo region

Glue is visible in several spots when studied closely

Chocolate dogtooth calcite, large Stalactitic chalcedony or spots under magnification (youLocale: Santa Eulalia, Chihuahua, Mexico Approx size: 5 x 3 x 1. 75" Approx weight: 372g 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