Crystal Encyclopedia

Natrolite

Haineaultite-Analcime-Natrolite Bombay Quarry, Mumbai District (Bombay District), Maharashtra, India Natrolite is a tectosilicate mineral belong to zeolite group members.Its formula Na2Al2Si3O10 • 2H2O. A hydrated sodium aluminosilicate, natrolite takes its name from the Greek word natrium, which means “soda” a reference to the sodium content of this mineral. Natrolite can be pale pink, colorless, white, […]

Pyromorphite

Pyromorphite is a secondary lead mineral that forms in the oxidation zones of lead ore deposits. It is classified as a member of the apatite group of phosphates and has the chemical formula Pb5_55​(PO4_44​)3_33​Cl. The mineral is primarily composed of lead (Pb), phosphorus (P), oxygen (O), and chlorine (Cl). Small amounts of arsenic can sometimes […]

Aragonite

Aragonite crystals. Aragonite is a variant of calcium carbonate, along with the mineral calcite. This sample, found in Morocco, is 4 centimetres long. crystals of Aragonite mineral stone isolated on white background Aragonite is a carbonate mineral and its formula is calcium carbonate. It has the same formula as Calcite and Vaterite, but has a […]

Cacoxenite

Cacoxenite is a mineral that is primarily composed of iron, aluminum, phosphate, and hydroxide ions. It is a relatively rare mineral and is often found as an accessory mineral in various types of rocks, particularly in association with iron ores and phosphates. Cacoxenite is part of a mineral group known as the “aluminum phosphate sulfate […]

Ilmenite

Ilmenite an outstanding tabular group of large parallel-growth crystals Ilmenite-magnetite by James St. John (Flickr.com) Ilmenite, otherwise called manaccanite, is a titanium-iron oxide mineral with formula: FeTiO3. It is a noteworthy wellspring of titanium. Typically thick and tabular, its crystals sometimes occur as thin lamellae (fine plates) or rhombohedra.. It can also be massive, or […]

Goethite

Goethite is a common iron oxide mineral that has a chemical formula of FeO(OH). It is often referred to as “limonite” although that term is used more broadly to describe a mixture of various iron oxides and hydroxides. Goethite is an important mineral in various geological and environmental contexts due to its widespread occurrence and […]

Borax

Borax, also known as sodium borate or sodium tetraborate, is a naturally occurring mineral that has been used for various purposes throughout history. It is composed of boron, sodium, oxygen, and water molecules. The chemical formula for borax is Na2B4O7·10H2O. Origin and Occurrence: Borax is typically found in dry lake beds, salt flats, and sedimentary […]