Calcite with Goethite - Mexico 5" x 2" Angel Aura unlike agate which you can

unlike agate which you can shine a light thru

These beautiful petrified wood Slabs come with an iron display stand

Each pair of Oco Geode slice earrings is unique and sizes vary

Blue Barite is rare and less available compared to other types of barite

You can read about each crystal in our gemstone directory

Calcite with Goethite - Mexico 5" x 2" Angel Aura unlike agate which you canThis 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