Minerals

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Howlite

Howlite (Calcium Borosilicate Hydroxide: Ca2B5SiO9(OH)5)

Granitic Gravel Piece

Granite (Felsic Plutonic Rock / SiO2 with Al2O3, K2O, Na2O)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Muscovite Schist

KAl2(AlSi3O10)(OH)2 (Muscovite) in Schist Matrix

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Greenstone

Metabasalt / Greenschist facies rock

Sandstone

Arenite

Mica Schist

Schist (Crystalline metamorphic rock)

Schist with Quartz Veins

Schist with Quartz (SiO2)

Chrysocolla

Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O

Arsenopyrite with Schist Matrix

Arsenopyrite (FeAsS)

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3)

Honey Calcite

Calcium Carbonate (CaCO3)

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Greenschist

Greenschist (chlorite-epidote schist)

Milky Quartz

Silicon Dioxide (SiO2)

White Marble

Recrystallized Calcite (CaCO3)

Limonite (Iron Ore)

Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)

Tiffany Stone

Bertrandite (Be4Si2O7(OH)2) mixed with Fluorite (CaF2), Opal, and Chalcedony

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Gold in Matrix

Native Gold (Au)

Quartz Geode (with Agate banding)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Potassium Feldspar (KAlSi3O8)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartz (Milky/Crystal variety)

Silicon Dioxide (SiO2)

Quartz (Yellow/Tan Quartzite Pebble)

Silicon Dioxide (SiO2)

Porphyry (likely Porphyritic Andesite or Basalt)

Porphyritic Igneous Rock

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Labradorite

Labradorite (a calcium-enriched sodic plagioclase feldspar mineral - (Ca, Na)(Al, Si)4O8)

Schist

Mica Schist

Sandstone with Iron Staining

Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))