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Description

Chocolate dogtooth calcite, largeLocale: Santa Eulalia, Chihuahua, Mexico Approx size: 4 x 3 x 2. 5" Approx weight: 652g (about 1 1 3 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

On other specimens the ends appear cubic and can take on a purple amethyst hue

typically cyanobacteria

124g I 2 x 1

or simply unfortunately (or… fortuitously

you can see the first generation of growth was an icy clear colorless quartz

and in cracks on the sides

some featuring a faint version of the color-zoned 'sandwich' habit common to this region (where the main faces are slightly lighter in color like a slice of bread on each side of a darker center)

either from pseudomorphing or from iron oxide inclusions

surrounded by orange chalcedony

and the other side has excellent spherical formations

This specimen does exhibit these features

** Staining warning

Exchange/Return Notes