Geographic Minerals

Avicennite (thallium(III) oxide) is an oxide mineral. It is an isometric-diploidal grayish black mineral containing oxygen and thallium. It is not radioactive. It was discovered…

Autunite (hydrated calcium uranyl phosphate) with the formula: Ca(UO2)2(PO4)2·10-12H2O; is one of the more attractive and popular radioactive minerals. IIt is a yellow-greenish fluorescent mineral…

Austinite is a member of the adelite-descloizite group, adelite subgroup, the Zn end member of the Cu-Zn series with conichalcite. It is fairly rare but…

Aurostibite is an isometric gold antimonide mineral which is a member of the pyrite group. It is not radioactive. Aurostibite was discovered in 1952 and…

Aurichalcite is a carbonate mineral, usually found as a secondary mineral in copper and zinc deposits. It was named after the Latin word for golden…

Augite is a common rock-forming pyroxene mineral with formula (Ca, Na) (Mg, Fe, Al, Ti) (Si, Al)2O6. It is a rock-forming mineral that commonly occurs…

Augelite is an aluminum phosphate mineral with formula: Al2(PO4)(OH). It is a rare mineral that forms as a result of hydrogen metamorphism of phosphate rocks…

Aubertite is a mineral with the chemical formula CuAl(SO4)2Cl·14H2O. It is named after the French geophysicist J. Aubert, who was the first to collect samples…

Atheneite is a rare palladium, mercury arsenide mineral with formula (Pd, Hg)3As associated with palladium-gold deposits. It is not radioactive. It was named after the…

Athabascaite is a member of the copper selenide minerals and forms with other copper selenides. It was first discovered by S. Kaiman in 1949 while…

Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It is an unusual and attractive halide mineral. It is polymorphous with…

Astrophyllite [Formula: (K, Na)3(Fe++, Mn)7Ti2Si8O24(O, OH)7] is a very rare, brown to golden-yellow hydrous potassium iron titanium silicate mineral. It is a unique and rare…