Calcite with Goethite - Mexico 5" x 2"

This spectacular piece features Calcite infutilized with intricate Goethite.
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite". How is calcite formed? Calcite can form by direct precipitation from waters rich in calcium. As concentrations increase or the amount of water decreases crystals of solid calcite crystals form. Calcite can also form in caves and where springs emerge on the surface Calcite metaphysically is believed to amplify thought, improve memory, and promote development.