Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
sedimentary
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
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Calcite crystal
Calcite (CaCO₃)
mineral
Bituminous coal
Coal; predominantly vitrinite and inertinite macerals composed chiefly of carbon, hydrogen, oxygen, nitrogen, and sulfur
sedimentary
Botryoidal quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
mineral
Amber with dark mineral/organic inclusions
Fossilized plant resin (amber; chiefly polymerized diterpenoid resin)
gemstone
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Chert (Tan/Grey)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (with Quartz veins)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Golden/Yellow Variety)
Microcrystalline Silica (SiO2)
sedimentary
Chert (containing Flint and Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Breccia
Microcrystalline Quartz (SiO2) Breccia
sedimentary
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Basalt with Quartz Veining
Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Basalt with Quartz Vein
Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion
igneous
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Quartz Crystal Cluster on Matrix
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock including secondary mineral infills)
Igneous
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Iron-rich quartzite or ferruginous metamorphic rock
Quartzite, predominantly SiO₂, stained by iron oxides (hematite/goethite)
metamorphic
Pyrite (or Fool's Gold)
Pyrite (FeS₂)
Mineral
Quartzite pebble
Crystalline silica (SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert / Flint Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz with Chlorite or Hornblende inclusions
Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions
metamorphic
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veining in silicate matrix
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2) with impurities
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline quartz (SiO2) with impurities
sedimentary