Geographic Minerals

Panethite, chemical formula (Na,Ca)2(Mg,Fe)2(PO4)2, is a rare phosphate mineral found in only one meteorite on Earth. It was first discovered in the Dayton meteorite in…

Palygorskite, also known as attapulgite, is a magnesium aluminum phyllosilicate with the chemical formula (Mg,Al)2Si4O10(OH)•4(H2O) that occurs in a type of clay soil found in…

Boracite (Mg3B7O13Cl) is a magnesium borate mineral. In the orthorhombic – pyramidal crystal system, it appears as blue-green, colorless, gray, yellow to white crystals. Boracite…

Palladium has the chemical symbol Pd and the atomic number 46. It is a rare and gleaming silvery-white metal discovered by the English chemist William…

Painite is an extremely rare type of borate mineral. It was discovered in Myanmar by Arthur C.D. Pain, a British mineralogist and gem dealer, who…

Pabstite is a mineral composed of barium, tin, and titanium that can be found in contact metamorphosed limestone. It is a mineral of the benitoite…

Pääkkönenite is a metallic grey mineral with the molecular formula Sb2AsS2. It is named after Veikko Pääkkönen (1907–1980), a Finnish geologist. It is a fairly…

Speculum metal is a white brittle alloy composed of around two-thirds copper and one-third tin that may be polished to produce a highly reflecting surface.…

Antigorite is a lamellated, monoclinic mineral in the serpentine phylosilicate subgroup with the ideal chemical formula (Mg, Fe)3Si2O5OH4. It is a monoclinic layered-structured mineral with…

Onyx is the name given to a parallel banded variant of the silicate mineral chalcedony. Agate and onyx are both layered chalcedony variants that differ…

Osumilite is a potassium-sodium-iron-magnesium-aluminium silicate mineral that is extremely rare. It was discovered in a volcanic rock in Sakkabira, Kyusyu, Japan, and was named after…

Otwayite, Ni2CO3(OH)2, is a hydrated nickel carbonate mineral. It is a green orthorhombic hydrated nickel carbonate mineral. It is green, with a hardness of 4,…