Rock Identifier

Category

Organic Mineraloid

Browse organic mineraloid specimens identified by the Rock Identifier community.

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

metamorphic
Quartzite (Quartzite (predominantly SiO2)) — metamorphic

Quartzite

Quartzite (predominantly SiO2)

metamorphic
Fossiliferous Limestone (Calcium Carbonate - CaCO3) — sedimentary

Fossiliferous Limestone

Calcium Carbonate - CaCO3

sedimentary
Marble (Carrara Marble style) (Recrystallized Calcite (CaCO3)) — metamorphic

Marble (Carrara Marble style)

Recrystallized Calcite (CaCO3)

metamorphic
Fossiliferous Limestone (Biogenic Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

sedimentary
Quartzite (Quartzite (mainly SiO2)) — metamorphic

Quartzite

Quartzite (mainly SiO2)

metamorphic
Limestone (specifically Fossiliferous Limestone) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

sedimentary
Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

sedimentary
Mookaite Jasper (Radiolarite (SiO2 with impurities)) — sedimentary

Mookaite Jasper

Radiolarite (SiO2 with impurities)

sedimentary
Chert (Yellow Jasper/River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper/River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary
Fossilized Echinoid (Sea Urchin) (Echinoidea (Class), often found as calcitic fossils) — sedimentary

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class), often found as calcitic fossils

sedimentary
Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Pink Granite (Phaneritic Quartz-Feldspar Plutonic Rock) — igneous

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

igneous
Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Chert (Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2)

sedimentary
Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Chert (Black Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Black Flint)

Chert (Microcrystalline Quartz, SiO2)

sedimentary
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Calcite (Calcite (CaCO3)) — Mineral

Calcite

Calcite (CaCO3)

Mineral
Chert (Flint) (Silicon Dioxide (SiO2)) — Sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Sedimentary
Chert (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Quartz, SiO2)

sedimentary
Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

sedimentary
Limestone (specifically Chalky Limestone) (Calcium Carbonate (CaCO3 / Calcite)) — sedimentary

Limestone (specifically Chalky Limestone)

Calcium Carbonate (CaCO3 / Calcite)

sedimentary
Chert (Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary
Chert / Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Jasper

Silicon Dioxide (SiO2)

sedimentary
Chert (variations include Flint/Jasper) (Chert (SiO2)) — sedimentary

Chert (variations include Flint/Jasper)

Chert (SiO2)

sedimentary
Gold-Bearing Quartz (Silicon Dioxide with Native Gold (SiO2 + Au)) — mineral

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

mineral
Chert (Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary
Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

sedimentary
Chert (Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint variety)

Silicon Dioxide (SiO2)

sedimentary
Crushed Limestone Aggregate (Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Crushed Limestone Aggregate

Limestone (Calcium Carbonate, CaCO3)

sedimentary
Chert (Flint) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Flint)

Cryptocrystalline Silica (SiO2)

sedimentary
Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Chert (and Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Auriferous Quartz (Gold-bearing Quartz) (Silicon Dioxide (SiO2) with Elemental Gold (Au)) — mineral

Auriferous Quartz (Gold-bearing Quartz)

Silicon Dioxide (SiO2) with Elemental Gold (Au)

mineral
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Chert (Jasper/Brown Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Brown Chert)

Silicon Dioxide (SiO2)

sedimentary
Granite (Granite (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (primarily Quartz, Feldspar, and Mica)

igneous
Chert (Nodule) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary