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Laumontite: CaAl2Si4O12·4(H2O)
Comments: Diamond-shaped prism of laumontite with chrysocolla. Location: Azurite mine, Pinal County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Laurionite: PbCl(OH)
Comments: Colorless, stellate spray of acicular Laurionite crystals on matrix. Location: Laurium, Greece. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lavendulan: NaCaCu5(AsO4)4Cl·5(H2O)
Comments: Bright blue crystals of Lavendulan crystals. Location: Gold Hill mine, Deep Creek Mountains, Tooele County, Utah, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lazulite: MgAl2(PO4)2(OH)2 Whiteite-(CaMnMg): CaMn++Mg2Al2(PO4)4(OH)2·8(H2O)
Comments: Light beige-colored whiteite-(CaMnMg) crystal perched on dark blue lazulite. Location: Rapid Creek, Yukon Territory, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Leadhillite: Pb4(SO4)(CO3)2(OH)2
Comments: Clear crystal of leadhillite on matrix. Location: Leadhills, Lanark, Scotland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Leightonite: K2Ca2Cu(SO4)4·2(H2O)
Comments: Pale Leightonite with dark green atacamite. Location: Chuquicamata, Antofagasta, Chile. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lengenbachite: Pb6(Ag,Cu)2As4S13
Comments: Shiny, opaque crystalline spray of lengenbachite on white dolomite?. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lepidolite: K(Li,Al)3(Si,Al)4O10(F,OH)2
Comments: Pale lavender micaceous plates of lepidolite on matrix. Location: Minas Gerais, Brazil. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Leucophanite: (Na,Ca)2BeSi2(O,OH,F)7
Comments: Pseudo-cubic crystals of leucophanite. Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Leucophosphite: KFe+++2(PO4)2(OH)·2(H2O) Messelite: Ca2(Fe++,Mn)(PO4)2·2(H2O)
Comments: White messelite crystals with greenish leucophosphite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Linarite: PbCu(SO4)(OH)2
Comments: Deep blue prismatic crystals of linarite on matrix. Location: Mammoth mine, Tiger, Pinal County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lindgrenite: Cu3(MoO4)2(OH)2
Comments: Transparent green plates of lindgrenite on matrix. Location: Chuquicamata, Antofagasta, Chile. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Linnaeite: Co++Co+++2S4
Comments: Brassy metallic octahedral crystal of linnaeite on matrix. Location: Cobalt, Ontario, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lithiophilite: LiMnPO4
Comments: Twinned crystals of yellowish brown lithiophilite. Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Liveingite: Pb9As13S28
Comments: Deep blue striated prismatic crystal of liveingite on a white dolomite matrix. Location: Lengenbach quarry Binntal, Valais, Switzerland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lollingite: FeAs2
Comments: Sharp, twinned crystals Löllingite on matrix. Location: Oruro, Oruro Department, Bolivia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lorandite: TlAsS2
Comments: Gemmy, transparent reddish brown crystals of lorandite on matrix. Location: Allchar, near Majdan, Macedonia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Lotharmeyerite: CaZnMn+++(AsO3OH)4(OH)3
Comments: Brown, prismatic crystals lotharmeyerite on matrix. Location: Ojuela mine, Mapimi, Durango, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mackayite: Fe+++Te2O5(OH)
Comments: Greenish brown crystals of mackayite on matrix. Location: McGuinnity shaft, Goldfield, Esmeralda County, Nevada, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Magnetite: Fe++Fe+++2O4
Comments: Black, opaque octahedral crystals of magnetite on matrix. Location: Isle of Ischia, near Naples, Compania, Italy. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals