Equinoids are also a favorite among those familiar with Paleontology (the study of the development of life on Earth)

Clarity:  Fine Crystal

Clarity:  VSI (Very Slightly Included)

The specimen is covered with sky blue azurite forms on the surface as small crystals and some large patches of malachite

Color: Spring Green

Gray Calcite on Green Crystal Matrix | 153.7 gr | Morocco Topaz Equinoids are also a favoriteThis is an attractive specimen consisting of natural pale gray transparent crystals of Calcite on a green crystal matrix from Morocco. Very beautiful material. Calcite is found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" one that is found everywhere. Calcite is the principal constituent of limestone and marble. Name: Calcite Crystal Specimen Size: Cabinet Sized