Colorless calcite with dusting of red-brown iron Aquamarine This is a beautiful example

This is a beautiful example of growth forms typical of this region

with more irregular stepped ends on the striations of the main crystals

This calcite specimen from Santa Eulalia is a lovely deep red color from hematite (iron oxide) inclusions

Specimens including this one feature unusual "tutus" of quartz or chalcedony growth on some of the spires—in this case it has curiously taken on a square shape and banded agate appearance

It has a dynamic

Colorless calcite with dusting of red-brown iron Aquamarine This is a beautiful exampleLocale: Santa Eulalia, Chihuahua, Mexico Approx dimensions: 4 x 3 x 1. 25" Approx weight: 388g This calcite specimen from Santa Eulalia has a layer of calcite druzy with several larger modified rhombohedral calcite crystals perched atop. The druzy is well formed, composed of interlocking calcite crystals. The piece appears finely dusted with cinnamon brown color: this is hematite which causes the red and brown coloration of the mineral. UV reactivity