Igneous, Sedimentary, And Metamorphic

Milky Quartz

Silicon Dioxide (SiO2)

Massive White Quartz

Silicon Dioxide (SiO2)

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Orange Quartz / Peach Aventurine

Silicon Dioxide (SiO2)

Magnetite / Lodestone

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Magnetite / Hematite mix

Magnetite (Fe3O4) and Hematite (Fe2O3)

Orange Calcite

Calcium Carbonate (CaCO3)

White Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Raw Calcite

Calcium Carbonate (CaCO3)

Pyrite-bearing Rock

Iron Sulfide (FeS2) associated with host rock

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

White Quartz

Silicon Dioxide (SiO2)

Pebble Gravel Mix (Quartzite, Basalt, Chert)

Alluvial River Gravel / Aggregate Clasts

Rough Quartz (Milky / Clear Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Quartz (Milky or Yellow variety)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Magnetite

Fe3O4 (Iron(II,III) oxide)

Gneiss

Metamorphic Gneiss

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Pyrite

Iron Pyrite (FeS₂)

Quartzite with Mica / Gneiss Pebble

Metamorphic Rock (Quartz-Feldspar-Mica aggregate)

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Muscovite

KAl2(AlSi3O10)(OH)2

Petrified wood

Silicified wood; commonly quartz/chalcedony (SiO₂) replacing organic tissue

Quartz pebble

Silicon dioxide (SiO2)

Garnet Gneiss

Garnetiferous quartzo-feldspathic gneiss

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)