Tom Loomis's Image Gallery

Lamprophyllite: Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2

Comments: Deep-red, acicular spray of lamprophyllite in matrix.
Location: Kola Peninsula, Russia. Scale: Crystal size 1.5 cm.
© Tom Loomis / Dakota Matrix

Lasalite: Na2Mg2(V10O28)·20H2O

Comments: Bright orange efflorescent lasalite crust on sandstone.
Location: Vanadium Queen mine, San Juan Co., Utah, USA. Scale: Picture Size 2 x 2 cm.
© Tom Loomis / Dakota Matrix

Laurelite: Pb7F12Cl2

Comments: Snow white acicular crystals of laurelite.
Location: Grand Reef mine, Graham Co., Arizona, United States. Scale: Crystal size 7 mm.
© Tom Loomis / Dakota Matrix

Leifite: Na2(Si,Al,Be)7(O,OH,F)14

Comments: Snow white, prismatic, crystal aggregate of leifite.
Location: Poudrette Quarry, Mont St. Hilaire, Quebec, Canada. Scale: 3x1cm.
© Tom Loomis / Dakota Matrix

Lemoynite: (Na,K)2CaZr2Si10O26·5-6(H2O)

Comments: Yellowish white, radial, spherical spray of prismatic Lemoynite crystals to 5mm in diameter on matrix.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Leucophosphite: KFe+++2(PO4)2(OH)·2(H2O)

Comments: Crude or etched purple crystals of leucophospiite to 1mm in vuggy triphylite matrix.
Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Leucosphenite: Na4BaTi2O2[B2Si10O28]

Comments: Glassy crystal of leucosphenite in mudstone.
Location: Carter Oil Co. Poulson No. 1 Well, Uinta Basin, Duchesne Co, Utah, USA. Scale: Overall: 2 x 1.5 x 2 cm.
© Tom Loomis / Dakota Matrix

Libethenite: Cu2(PO4)(OH)

Comments: Dark to light green pseudo-octahedral crystals of libethenite to 1.5mm on matrix.
Location: KOV pit, Kolwezi, Katanga, Congo. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Lindbergite: Mn(C2O4)·2(H2O)  
Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5

Comments: Rare organic mineral - lindbergite (Mn dihydrate oxalate) in white patches on rockbridgeite matrix.
Location: Boca Rica mine, Sapucaia do Norte, Gilileia, Minas Gerais, Brazil. Scale: Spot size 1 mm.
© Tom Loomis / Dakota Matrix

Luddenite: Pb2Cu2Si5O14·14(H2O)

Comments: Light green crystalline crust of luddenite in patches to 1mm on matrix with colorless micro-crystals that are possibly alamosite and wickenbergite.
Location: Rawhide mine, Artillery Peak dist., Mohave Co., Arizona, USA. Scale: Overall: 4 x 3.5 x 3.5 cm.
© Tom Loomis / Dakota Matrix

Macfallite: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3  
Johnsenite-(Ce): Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2  
Braunite-I: Mn++Mn+++6SiO12

Comments: Tiny - less than 1mm - maroon crystals of mcfallite suspended as inclusions in massive quartz along with larger spots of brown johnsenite-(Ce) and braunite.
Location: Artur mine, Jaguaracu, Minas Gerais, Brazil. Scale: Overall 3 x 2.5 slab.
© Tom Loomis / Dakota Matrix

Macquartite: Pb3Cu(CrO4)(SiO3)(OH)4·2(H2O)

Comments: Straw-like prismatic yellow micro crystals of macquartite to about 0.5mm on matrix.
Location: Mammoth - St. Anthony mine, Tiger, Pinal Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Macquartite: Pb3Cu(CrO4)(SiO3)(OH)4·2(H2O)

Comments: Bright yellow, prismatic crystals of macquartite in radial sprays to 0.75mm.
Location: Tiger, Mammoth district, Pinal County, Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Magnesioferrite: MgFe+++2O4  
Bromellite: BeO

Comments: A micro, water color, hexagonal or barrel shaped crystal of white bromellite to about 0.3 mm on yellowish calcite with associated black magnesioferrite.
Location: Langban, Varmland, Sweden. Scale: 18x9x10mm.
© Tom Loomis / Dakota Matrix

Malinkoite: NaBSiO4

Comments: White to clear glassy mico crystals of malinkoite to less than 0.75mm deep in a vug.
Location: Mont St. Hilaire, Rouville Co., Quebec, Canada. Scale: 2 x 1.5 x 1.5 cm.
© Tom Loomis / Dakota Matrix

Mangangordonite: (Mn++,Fe++,Mg)Al2(PO4)2(OH)2·8(H2O)

Comments: White, blocky crystal of mangangordonite to 0.5mm on matrix.
Location: Foote mine, Cleveland Co., North Carolina, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Manganiandrosite-(La): (Mn,Ca)(La,Ce,Ca,Nd)AlMn+++Mn++(SiO4)(Si2O7)O(OH)

Comments: Orange glassy crystalline manganiandrosite-(La).
Location: Mt. Petalon, Andros Island, Cyclades, Greece. Scale: Thumbnail.
© Tom Loomis / Dakota Matrix

Manganohornesite: (Mn,Mg)3(AsO4)2·8(H2O)

Comments: Micro, white, needles of manganese-hornesite to about 0.75mm on hausmannite-rich matrix.
Location: Langban, Varmland, Sweden. Scale: 5.5 x 4 x 2.5cm.
© Tom Loomis / Dakota Matrix

Manganvesuvianite: Ca19Mn+++(Al,Mn+++,Fe+++)10(Mg,Mn++)2Si18O69(OH)9

Comments: Dark cherry red prismatic, crystals or manganvisuvianite to 2mm on matrix.
Location: N'Chwanning mine, Kalahari Mn Field, North Cape Province, South Africa. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Margarosanite: Pb(Ca,Mn++)2Si3O9

Comments: Clear or white, long, thin bladed crystals of margarosanite on matrix.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1cm.
© Tom Loomis / Dakota Matrix