Pyrite
Iron Sulfide (FeS2)
Category
Browse igneous, sedimentary, and metamorphic mix specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Tumbled Amethyst
Quartz (SiO2) with trace amounts of Iron (Fe)
Quartz
Silicon Dioxide (SiO2)
Quartz vein material, likely milky quartz with iron staining
Quartz (SiO₂), possibly with feldspar and iron-oxide staining
Gneiss
Metamorphic Gneiss
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony
Quartz
SiO2 (Silicon Dioxide)
Quartz
Silicon dioxide (SiO2)
Quartz and Unakite
SiO2 (Quartz) / Epidote, Pink Orthoclase, Quartz (Unakite)
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide impurities
Magnetite or Hematite Nodule
Iron Oxide (Fe3O4 or Fe2O3)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
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)
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)
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)