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Leucosphenite: Na4BaTi2O2[B2Si10O28]
Comments: Glassy crystal of leucosphenite in mudstone. Location: Uintah Basin, Uintah County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Liandratite: U++++++(Nb,Ta)2O8
Comments: Yellow crystalline liandratite crust on pegmatite. Location: Antsakoa I Pegmatite, near Berere, Mahajanga, Madagascar. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Liddicoatite: Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4
Comments: Dark green translucent liddicoatite crystal prism. Location: Antandrokomby, Madagascar. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lillianite: Pb3Bi2S6
Comments: Gray metallic massive lillianite in clear quartz. Location: Gladhammar, Kalmar, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lindstromite: Pb3Cu3Bi7S15
Comments: Silvery metallic lindstromite on matrix. Location: Silver Miller Mine, Cobalt, Ontario, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lintisite: Na3LiTi2Si4O14·2(H2O) Serandite: Na(Mn++,Ca)2Si3O8(OH)
Comments: Yellowish-white fibrous veinlets of lintisite in brown serandite. Location: Mount Alluaiv, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Liottite: (Ca,Na,K)8(Si,Al)12O24[(SO4),(CO3),Cl,OH]4·(H2O)
Comments: Transparent colorless liottite crystal on vesuvianite. Location: Pitigliano, Grosseto, Tuscany, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lipscombite: (Fe++,Mn)Fe+++2(PO4)2(OH)2
Comments: Light to dark green botryoidal lipscombite crust on rock. Location: Valmy, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Liskeardite: (Al,Fe+++)3(AsO4)(OH)6·5(H2O)
Comments: Botryoidal liskeardite crusts. Location: Saint Hillary, Cornwall, England. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Litharge: PbO Massicot: PbO
Comments: Dark red litharge with brownish-yellow scaly massicot and white cerussite. Location: Patagonia, Santa Cruz County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lithiophilite: LiMnPO4 Sicklerite: Li(Mn++,Fe+++)PO4
Comments: Mottled tan-green-pink massive sicklerite with dark brown lithiophilite on quartz. Location: Custer Mountain Lode, Custer County, South Dakota, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lithiophilite: LiMnPO4 Triploidite: (Mn,Fe++)2(PO4)(OH)
Comments: Salmon-colored prismatic crystalline triploidite with brown lithiophilite. Location: Capoeira Mine, near Parelhas, Rio Grande do Norte, Brazil. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lithiowodginite: LiTa3O8
Comments: Black crystalline grains of lithiowodginite in pegmatite. Location: Tanco Mine, Bernic Lake, Manitoba, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lithosite: K6Al4Si8O25·(H2O)
Comments: Transparent nearly colorless lithosite in syenite rock. Location: Vuonnemiok River, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Litidionite: KNaCuSi4O10
Comments: Bright blue crystalline litidionite fragment. Location: Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Liveingite: Pb9As13S28 Seligmannite: PbCuAsS3
Comments: Black prismatic seligmannite crystals with crystalline black liveingite. Location: Lengenbach Quarry, Binnental, Valais, Switzerland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lomonosovite: Na5Ti2O2(Si2O7)(PO4) Bornemanite: BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}·PO4
Comments: Yellow crystalline bornemanite in dark brown lomonosovite. Location: Yubileinaya Pegmatite, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Loparite-(Ce): (Ce,Na,Ca)2(Ti,Nb)2O6 Perrierite-(Ce): (Ce,La,Ca)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22 Pyrochlore: (Na,Ca)2Nb2O6(OH,F) Zircon: ZrSiO4
Comments: Reddish black perrierite crystal, with orange-brown pyrochlore crystal, yellow-brown zircon, and grayish-black loparite. Location: Buer, Bjorkedalen, Langesundfjord, Telemark, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lopezite: K2Cr2O7
Comments: yellowish granular lopezite. Location: Tarapaca, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Lorenzenite: Na2Ti2Si2O9 Vuonnemite: Na11Nb2TiSi4O12(PO4)2O5F2
Comments: Square vuonnemite crystal with brown, lorenzenite crystals in syenite rock. Location: Ilimaussaq, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species