All rocks & minerals

White Quartz

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Pegmatite

Igneous Pegmatite (felsic intrusive rock)

Pyrite in Matrix

Iron Sulfide (FeS2) embedded in host rock

White Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Sedimentary Rock (Quartz Arenite)

Quartz

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock composed mainly of quartz sand

Gneiss

Gneiss

Muscovite Mica

Muscovite, KAl2(AlSi3O10)(OH)2

Graphic Granite

Pegmatitic Granite

Chrysotile Asbestos

Chrysotile (Mg3Si2O5(OH)4)

Chevron Amethyst

Silicon Dioxide with Iron Impurities (SiO2)

Silver

Ag (Native Silver)

Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Tumbled Agate

Silicon Dioxide (Chalcedony / Quartz)

Weathered Sandstone / Quartzite

Quartz Arenite

Quartzite

Metamorphic Quartzite (SiO2)

Limestone (Weathered)

Sedimentary carbonate rock, primarily calcium carbonate (CaCO3)

Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Labradorite

(Na,Ca)(Al,Si)4O8

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Yellow Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Citrine and Quartz

Silicon Dioxide (SiO2)

Pumice or Scoriaceous Basalt

Vesicular volcanic rock

Opalite

Synthetic Opalized Glass / Man-made Glass

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Pyrite in Quartz Matrix

Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)

Chalcopyrite

CuFeS2 (Copper Iron Sulfide)

Azurite

Cu3(CO3)2(OH)2

Petrified Wood

Silicified Wood (SiO2)

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Sandstone

Clastic sedimentary rock (Quartz arenite / Arkose)

Jasper

Microcrystalline Quartz (SiO2)

Hematite

Hematite (Fe2O3)

Granite

Intrusive Igneous Rock

Quartz with Pyrite

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Granite

Felsic intrusive igneous rock

Granite

Phaneritic Igneous Rock

Quartzite

Metamorphic Quartzite (SiO2)