Rock Identifier

Category

Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.

Satin Spar (Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Mica Schist (Mica Schist (predominantly Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Fossilized Sea Urchin (Echinoid) (Echinoidea (Fossil specimen, often replaced by Calcite or Silica)) — sedimentary

Fossilized Sea Urchin (Echinoid)

Echinoidea (Fossil specimen, often replaced by Calcite or Silica)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Opalite (Man-made Synthetic Glass (Silicon Dioxide with metal additives)) — mineral

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

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

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation

Ruby (Rough/Raw) (Corundum (Al2O3:Cr)) — mineral

Ruby (Rough/Raw)

Corundum (Al2O3:Cr)

Lapis Lazuli (Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Olivine Basalt (Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)) — igneous

Olivine Basalt

Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Diamond (Green tinted) (Carbon (C) with trace impurities or lattice defects) — mineral

Diamond (Green tinted)

Carbon (C) with trace impurities or lattice defects

Amethyst Quartz (Silicon Dioxide (SiO2)) — mineral

Amethyst Quartz

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Hematite (Iron Ore) (Hematite (Fe2O3)) — mineral

Hematite (Iron Ore)

Hematite (Fe2O3)

Bivalve Shell (Fossil or Contemporary) (Class Bivalvie (various genera and species of clams, cockles, etc.)) — Sedimentary (Biogenic sediment or biological remain)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Sedimentary (Biogenic sediment or biological remain)

Quartz (Milky or Druzy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Druzy variety)

Silicon Dioxide (SiO2)

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

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Chrysocolla (Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O

Coquina with Shell Fragment (Bioclastic Limestone (composed primarily of CaCO3)) — sedimentary

Coquina with Shell Fragment

Bioclastic Limestone (composed primarily of CaCO3)

Banded Calcite (often sold as Mexican Onyx or Aragonite) (Calcite/Aragonite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as Mexican Onyx or Aragonite)

Calcite/Aragonite (Calcium Carbonate, CaCO3)

Amethyst (Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Sandstone with iron oxide (Hematite/Limonite) cement) — sedimentary

Ferruginous Sandstone

Sandstone with iron oxide (Hematite/Limonite) cement

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chrysocolla in Matrix (Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla in Matrix

Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O

Arsenopyrite (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite

Arsenopyrite (FeAsS)

Diamond (Set in jewelry) (Cubic Carbon (C)) — mineral

Diamond (Set in jewelry)

Cubic Carbon (C)

Banded Iron Formation (BIF) (Banded Iron Formation (Magnetite-Hematite-Chert)) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (Magnetite-Hematite-Chert)

Banded Chert (Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Sedimentary Breccia (Breccia (Clastic Sedimentary Rock)) — sedimentary

Sedimentary Breccia

Breccia (Clastic Sedimentary Rock)

Chert (Iron-stained) (Chert (SiO2)) — sedimentary

Chert (Iron-stained)

Chert (SiO2)

Basalt with Quartz/Calcite Veins (Basalt (Aphanitic Mafic Volcanic Rock) with Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) inclusions) — igneous

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Volcanic Rock) with Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) inclusions

Amethyst (Amethyst (Silicon Dioxide, SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Ferruginous Sandstone (Sandstone with Iron Oxide (Limonite/Goethite)) — sedimentary

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Geode (Unopened) (Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)) — sedimentary

Geode (Unopened)

Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)

Brown Quartzite Pebble (Metadiagenetic Quartzite (primarily SiO2)) — metamorphic

Brown Quartzite Pebble

Metadiagenetic Quartzite (primarily SiO2)

Calcite (Optical Grade/Iceland Spar) (Calcium Carbonate (CaCO3)) — mineral

Calcite (Optical Grade/Iceland Spar)

Calcium Carbonate (CaCO3)

Quartz on Basalt (Silicon Dioxide (SiO2) on Mafic Igneous Rock) — Mineral on Igneous Rock

Quartz on Basalt

Silicon Dioxide (SiO2) on Mafic Igneous Rock

Mineral on Igneous Rock

Banded Calcite (Mexican Onyx) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcite (Calcium Carbonate, CaCO3)

Chalcedony Nodule (Commonly known as Agate or Chert) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

Chrysocolla in Quartz (Quantum Quattro variant) (Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2) — mineral

Chrysocolla in Quartz (Quantum Quattro variant)

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2