Rock Identifier

Category

Not A Rock (Man Made Polymer)

Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.

Learn about Not A Rock (Man Made Polymer) in the encyclopedia

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Map Jasper

Goldstone

Anorthosite

Gondite

Dunite

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Blue calcite sphere (Calcite (CaCO₃), commonly blue-calcite variety) — mineral

Blue calcite sphere

Calcite (CaCO₃), commonly blue-calcite variety

Pearl-and-gemstone insect brooch (Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image) — gemstone

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Chert (or Flint) (Chert (a cryptocrystalline variety of quartz, SiO2)) — sedimentary

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with trace aluminum and irradiation) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Metal Alloy (Jewelry) (Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.) — Man-made Material (jewelry, metal alloy)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Man-made Material (jewelry, metal alloy)

Petoskey Stone (Favosites alpenensis) — fossil

Petoskey Stone

Favosites alpenensis

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Mahogany Obsidian (Volcanic glass (SiO2 with Hematite/Magnetite inclusions)) — igneous

Mahogany Obsidian

Volcanic glass (SiO2 with Hematite/Magnetite inclusions)

Chert (Microcrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline quartz (SiO2)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

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

Chert (Flint)

Chert (SiO2)

Nephrite Jade (Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Chert (Green Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Green Chert or Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Dumortierite in Quartz (Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)) — mineral

Dumortierite in Quartz

Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)

Brown Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Brown Chert

Microcrystalline Quartz (SiO2)

Raw Diamond (Carbon (C)) — gemstone

Raw Diamond

Carbon (C)

Mother of Pearl (Nacre) (Calcium Carbonate (Aragonite) with organic conchiolin) — gemstone

Mother of Pearl (Nacre)

Calcium Carbonate (Aragonite) with organic conchiolin

Chert Arrowhead (Chert (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Chert Arrowhead

Chert (Cryptocrystalline variety of Quartz, SiO2)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint/Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint/Chalcedony)

Silicon Dioxide (SiO2)

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

Pearl (Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)) — mineral

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

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

Chert (and/or Flint)

Microcrystalline Quartz (SiO2)

Nacre (Mother of Pearl) (Nacre (Biogenic Aragonite/Calcite composite, CaCO3)) — mineral

Nacre (Mother of Pearl)

Nacre (Biogenic Aragonite/Calcite composite, CaCO3)

Diamond (in jewelry setting) (Carbon (C)) — mineral

Diamond (in jewelry setting)

Carbon (C)

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (with nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with nodule)

Microcrystalline Quartz (SiO2)

Diamond (in jewelry setting) (Adamantine Carbon (C)) — mineral

Diamond (in jewelry setting)

Adamantine Carbon (C)

Chert (often called Flint) (Chert (SiO2)) — sedimentary

Chert (often called Flint)

Chert (SiO2)

Sea Shell (Fighting Conch Fragment) (Calcium Carbonate (CaCO3) - Strombus alatus fragment) — sedimentary (biogenic)

Sea Shell (Fighting Conch Fragment)

Calcium Carbonate (CaCO3) - Strombus alatus fragment

sedimentary (biogenic)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary (fossilized)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

sedimentary (fossilized)