Science

Libethenite is a rare copper phosphate hydroxide mineral. It forms striking, dark green orthorhombic crystals. It is a secondary copper phosphate mineral found in the…

Levyne or levynite is a zeolite mineral, i.e. a hydrated silicate mineral. It is a whitish, reddish, or yellowish, transparent or translucent mineral, allied to…

Leucophoenicite is a mineral with formula Mn7(SiO4)3(OH)2. It is a mineral consisting of a manganese silicate. Generally brown to red or pink in color, the…

Leucophanite is an inosilicate mineral with a complex composition, [(Na, Ca)2BeSi2(O.OH.F)7]. It may contain cerium substituting in the calcium position. It is a mineral consisting…

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…