Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Category
Organic (Zoogenic)
Browse organic (zoogenic) specimens identified by the Rock Identifier community.
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Granite (tumbled pebble)
Granite (Plutonic Igneous Rock)
Igneous Rock
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Unakite
Epidotized Granite
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Fossiliferous Limestone
Calcium Carbonate - CaCO3
sedimentary
Marble (Carrara Marble style)
Recrystallized Calcite (CaCO3)
metamorphic
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (mainly SiO2)
metamorphic
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Mookaite Jasper
Radiolarite (SiO2 with impurities)
sedimentary
Chert (Yellow Jasper/River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class), often found as calcitic fossils
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Pink Granite
Phaneritic Quartz-Feldspar Plutonic Rock
igneous
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Black Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Calcite
Calcite (CaCO3)
Mineral
Chert (Flint)
Silicon Dioxide (SiO2)
Sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Limestone (specifically Chalky Limestone)
Calcium Carbonate (CaCO3 / Calcite)
sedimentary
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (variations include Flint/Jasper)
Chert (SiO2)
sedimentary
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Crushed Limestone Aggregate
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Flint)
Cryptocrystalline Silica (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary