Rock Identifier

Category

Synthetic (Not A Natural Rock)

Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.

Learn about Synthetic (Not A Natural Rock) in the encyclopedia

Asphalt Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Chalk

Zircon

Obsidian

Kimberlite

Emerald in Matrix

Emerald in Matrix

Tripolite

Guano

Halite

Aquamarine Matrix

Aquamarine Matrix

Rock Salt

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

Banded Chert / Chalcedony

Silicon Dioxide (SiO2)

Amethyst (Water-Worn Pebble) (Silicon Dioxide (SiO2 with iron impurities)) — mineral

Amethyst (Water-Worn Pebble)

Silicon Dioxide (SiO2 with iron impurities)

Tektite (Indochinite) (Tektite (Natural silica glass)) — igneous

Tektite (Indochinite)

Tektite (Natural silica glass)

Diamond (Natural Diamond (Carbon, C)) — mineral

Diamond

Natural Diamond (Carbon, C)

Diamond jewelry (Diamond (crystalline carbon, C)) — gemstone

Diamond jewelry

Diamond (crystalline carbon, C)

Chert (potentially worked flint) (Cryptocrystalline microcrystalline quartz (SiO2)) — sedimentary

Chert (potentially worked flint)

Cryptocrystalline microcrystalline quartz (SiO2)

Chalcedony (Agate Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Banded Chert / Cryptocrystalline Quartz (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Cryptocrystalline Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Unidentified dark pebble (Unknown) — unknown

Unidentified dark pebble

Unknown

Diamond (Natural Diamond (Carbon, C)) — gemstone

Diamond

Natural Diamond (Carbon, C)

Jasper Pebble (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Jasper Pebble

Microcrystalline Quartz (Chalcedony), SiO2

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Yellow Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2)

Black Onyx or Dyed Agate Node (Cryptocrystalline Quartz (SiO2)) — mineral

Black Onyx or Dyed Agate Node

Cryptocrystalline Quartz (SiO2)

Chalcedony (Agate nodule fragment) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate nodule fragment)

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Red Jasper with Quartz (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper with Quartz

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper (with Quartz and Chert) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper (with Quartz and Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Diamond (C) — gemstone

Diamond

C

Citrine (Heat-treated) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-treated)

Silicon Dioxide (SiO2)

Heart-shaped Jasper / Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Heart-shaped Jasper / Chert Pebble

Microcrystalline Quartz (SiO2)

Flint / Chert Nodule (Microcrystalline quartz (SiO2)) — sedimentary

Flint / Chert Nodule

Microcrystalline quartz (SiO2)

Banded Jasper (Silicon Dioxide with Iron Oxide Inclusions (SiO2)) — sedimentary

Banded Jasper

Silicon Dioxide with Iron Oxide Inclusions (SiO2)

Mammoth Molar Fossil (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Molar Fossil

Mammuthus primigenius (Tooth fragment)

Smoky quartz (Quartz, silicon dioxide (SiO₂), smoky variety) — mineral

Smoky quartz

Quartz, silicon dioxide (SiO₂), smoky variety

Diamond (or Diamond Simulant) (Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)

Milky quartz cluster (Quartz (silicon dioxide, SiO₂), likely druzy or microcrystalline quartz) — mineral

Milky quartz cluster

Quartz (silicon dioxide, SiO₂), likely druzy or microcrystalline quartz

Chert (River Pebble/Finger Stone) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (River Pebble/Finger Stone)

Microcrystalline quartz (SiO2)

Citrine Geode Fragment (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Geode Fragment

Silicon Dioxide (SiO2) with iron impurities

Diamond (or Diamond Simulant) (Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)

Diamond (or Cubic Zirconia / Gemstone Ring) (C (Carbon) for natural Diamond) — gemstone

Diamond (or Cubic Zirconia / Gemstone Ring)

C (Carbon) for natural Diamond

Tektite (Tektite (Natural Glassy Ejecta)) — mineral

Tektite

Tektite (Natural Glassy Ejecta)

Yellow Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Heat-Treated Amethyst (Commercial Citrine) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) with iron impurities

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Tumbled blue-gray mineral specimen (Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone) — mineral

Tumbled blue-gray mineral specimen

Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone

Amethyst on Basalt Matrix (Crystalline Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst on Basalt Matrix

Crystalline Silicon Dioxide (SiO2) with iron impurities