Crystals & Stones

Blue calcite specimen; photo by Stephanie Clifford, CC BY 2.0 — Roosters Peacock crystal guide
Blue Calcite: The Stone of Calm, Reflection & Gentle Communication
Blue Calcite is a blue variety of calcium carbonate, CaCO3, known for Mohs hardness 3, perfect rhombohedral cleavage and sensitivity to acids. Explore its mineral science, name history, modern symbolic... Read more...