Cinnabar is a naturally occurring mercury sulfide mineral with the chemical formula HgS. It is one of the most common and well-known sources of mercury. Cinnabar typically exhibits a striking […]
Chalcopyrite is a mineral and ore of copper. Its chemical composition is CuFeS2, meaning it contains copper (Cu), iron (Fe), and sulfur (S). Chalcopyrite is one of the most important […]
Nosean, otherwise called Noselite, is a mineral of the feldspathoid type in tectosilicate with formula: Na8Al6Si6O24 (SO4). H2O. It frames isometric precious stones of variable shading: white, dim, blue, green, […]
Rosasite is a secondary mineral that typically forms in oxidized zones of copper-zinc ore deposits. It is chemically composed of copper zinc carbonate hydroxide, with the formula CuZnCO3(OH)2CuZnCO3(OH)2. This mineral […]
Rhodochrosite is a carbonate mineral with formula: MnCO3. It has a classic rose-pink color, but specimens can also be brown or gray. It forms dogtooth or rhombohedral crystals like calcite, […]
Staurolite is a mineral that is known for its unique crystal shape and its association with metamorphic rocks. The name “staurolite” comes from the Greek words “stauros” meaning “cross” and […]