Pyrite
Iron Sulfide (FeS2)
mineral
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Barite Rose
Barium Sulfate (BaSO4)
mineral
Tumbled milky quartz pebble
Quartz, silicon dioxide (SiO₂), microcrystalline to coarsely crystalline variety
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Celestite Geode
Strontium Sulfate (SrSO4)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper in Quartz / Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
sedimentary
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Banded Chert Pebble
Silicon Dioxide (SiO2)
sedimentary
Green Chert
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint) with Limonite Staining
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble (River Rock)
Metamorphic Quartzite (predominantly SiO2)
metamorphic
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Weathered banded iron formation (iron-rich quartzite)
Banded iron formation (BIF), chiefly hematite/magnetite and microcrystalline quartz (SiO₂)
sedimentary
Chert (Arrowhead or Flake)
Microcrystalline quartz (SiO2)
sedimentary
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
sedimentary
Raw Quartz
Silicon Dioxide (SiO2)
mineral
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Marcasite on Agate / Sphalerite-Pyrite Agate Geode Slice
Marcasite (FeS2) / Pyrite on Quartz (SiO2)
mineral
Chert
Silicon dioxide (SiO2)
Sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Agate (Geode nodule)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral