Geographic Minerals

Leucite is a rock-forming mineral composed of potassium and aluminum tectosilicate K[AlSi2O6]. It is a member of the feldspathoid group, forming directly from cooling lava…

Letovicite is an ammonium sulfate mineral with composition (NH4)3H(SO4)2. It is a mineral consisting of an acid ammonium sulfate. Also consists of triclinic mineral containing…

Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with the formula [K(Li, Al, Rb)2(Al, Si)4O10(F, OH)2]. It is a mineral…

Lepidocrocite [γ-FeO(OH)], also called esmeraldite or hydro hematite, is an iron oxide-hydroxide mineral. It is a red to reddish-brown mineral consisting of iron oxide hydroxide;…

Leightonite is a rare sulfate mineral with a formula of K2Ca2Cu(SO4)4•2H2O. It is a mineral consisting of a hydrous sulfate of copper, calcium, and potassium.…

Leifite is a rare tectosilicate. It a mineral consisting of a rare fluoride and silicate of sodium and aluminum. It is a rather rare and…

Legrandite is a rare zinc arsenate mineral, Zn2(AsO4)(OH)·(H2O). It is a mineral consisting of a hydrous basic arsenate of zinc. It is a rare and…

Leadhillite is a lead sulfate carbonate hydroxide mineral, often associated with anglesite. It is a monoclinic mineral of a yellowish or greenish white color consisting…

Lazurite is a tectosilicate mineral with sulfate, sulfur and chloride with formula: (Na, Ca)8[(S, Cl, SO4, OH)2|(Al6Si6O24)]. It is fairly complex as minerals go, combining…

Lazulite, formula – [(Mg, Fe2+)Al2(PO4)2(OH)2] is a blue, phosphate mineral containing magnesium, iron, and aluminum phosphate. It is a member of the Phosphate family. It…

Lawsonite is a hydrous calcium aluminum sorosilicate mineral with formula CaAl2Si2O7(OH)2·H2O. It is a pale or grayish blue mineral in prismatic orthorhombic crystals consisting of…

Lavendulan is an uncommon copper arsenate mineral, known for its characteristic intense electric blue color. It is an orthorhombic mineral containing arsenic, calcium, chlorine, copper,…