Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
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Chalcedony
Silicon Dioxide (SiO2)
mineral
Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)
Cryptocrystalline Quartz (SiO2) with inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
sedimentary
Specular Hematite
Iron Oxide (Fe2O3)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Chalcedony
Chalcedony (SiO2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Dyed Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian
Chalcedony (SiO2) with Iron Oxide inclusions
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
mineral
Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
mineral
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Sandstone
Arenite (primarily Quartz-based Sandstone)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Mineral
Chert / Jasper
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomeratic Sandstone
sedimentary
Ammonite Fossil in Limestone Matrix
Ammonoidea (subclass) in Calcium Carbonate (CaCO3)
sedimentary
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
metamorphic
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
River Cobble with Algae Patina
Weathered Chert or Quartzite pebble (SiO2 dominated)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary