Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
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Quartzite with Gneissic Banding
Quartzite (primarily SiO2) with mafic mineral inclusions
metamorphic
Banded Iron Formation (BIF) / Tiger Iron variety
Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)
sedimentary
Chert (with potential fossil inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Jasper (or Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartz Sand Grain / Micro Crystal
Silicon Dioxide (SiO2)
mineral
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Quartz Arenite)
Sandstone (Chemical formula: primarily SiO2)
sedimentary
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Quartz (Grain/Pebble)
Silicon Dioxide (SiO2)
mineral
Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Gold
Native Gold (Au)
mineral
Gold Flakes (Placer Gold)
Gold (Au)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gold
Native Gold (Au)
mineral
Sandstone and Quartzite Specimens
SiO2 with varying mineral/clastic inclusions
sedimentary/metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Chert (often called Jasper or Flint)
Microcrystalline Silica (SiO2)
sedimentary
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Banded)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Chert (Flint/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion
sedimentary
Grey Chert River Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint/Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chalcedony (likely common gray chalcedony)
Microcrystalline quartz, SiO₂
mineral
Carnelian
Silicon Dioxide (Quartz variety, SiO2)
mineral