Crystal System; Orthorhombic
Color: Colorless, white, gray, yellowish, reddish, green
Hardness: 3 1/2 - 4
Fracture: Subconchoidal, brittle
Specific Gravity: 2.9
Transparency: Transparent to translucent
Aragonite is commonly considered to have identical chemical compositions to the more common mineral calcite, which makes apart of the carbonate group. Aragonite rather forms in more limited geological environmental conditions, which makes it more of a calcium carbonate. Its rather commonly known as mineral that is relatively unstable and can also become altered to calcite. The difference between Aragonite and Calcite is that Aragonite belongs to the Orthorhombic crystal system, while calcite belongs to the trigonal crystal system. Many crystals of aragonite are considered to be often twinned that takes on a hexagonal appearance, but can also come in a single crystals that are often prismatic. In some cases, it may also be columnar, stalacititic, radiating, or even fibrous. It can also sometimes appear similar to calcite, aragonite is easily distinguished by the absence of rhombohedral cleavage. It can also be various colors that ranges from white, colorless, gray, yellowish green, blue, reddish, violet, or even brown in color.
Aragonite is mainly found in oxidized zones of ore deposits and elsewhere, that's formed at low temperatures near the surface of the Earth. It can also be found in caves as stalactites, that's formed around hot springs, and in mineral veins, which can also occur in coral-like aggregates in iron ore deposits that are associated with siderite. Aragonite is commonly also referred as flos ferri, which means flowers of iron. In some cases, its also the banded stalactitic material that is polished or as an ornamental stone, and transparent crystals are rarely faceted for collectors. Aragonite is also considered to be produced by biological processes yet to be fully understood. Facet quality crystals of Aragonite are typically found in Czech Republic, superb cave growths from Mexico, flos ferri from Austria, and Greece, with fine crystals coming from Morocco, England, France, Germany, Italy, Hungary, Japan, and numerous other localities in the U.S. It may also be discovered in some metamorphic and igneous rock types depending on the condition of the environment,
Aragonite rather has its own chemical formula that's commonly known as CaCo3, and is apart of the Orthorhombic crystal system. The mineral Aragonite it self is typically considered to have actually been named in 1797, from the main area it was discovered in (Molina de Aragon, in the province of Guadalajara, in Castilla La-Mancha, Spain. Its also considered to be thermodynamically unstable at temperature and pressures, and tends to also alter to calcite on scales 10 to 10 years.