Rock Identifier

Category

Man Made Material (Jewelry, Metal Alloy)

Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.

Granodiorite (River Pebble) (Granodiorite) — igneous

Granodiorite (River Pebble)

Granodiorite

igneous
Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

igneous
Rose Quartz with Schist Matrix (Silicon Dioxide (SiO2) with Mica-Schist) — mineral

Rose Quartz with Schist Matrix

Silicon Dioxide (SiO2) with Mica-Schist

mineral
Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

sedimentary
Chert (Chalk-associated Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chalk-associated Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Sandstone (Arenite (general term for sandstone)) — Sedimentary Rock

Sandstone

Arenite (general term for sandstone)

Sedimentary Rock
Iron Meteorite (likely Chondrite or weathered Iron-Nickel) (Meteorite (Fe-Ni alloy & silicates)) — igneous

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

igneous
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Chert (Nodular) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodular)

Cryptocrystalline Quartz (SiO2)

sedimentary
Calcite (or Alabaster, if truly carved) (Calcium Carbonate (CaCO3)) — Mineral/Rock

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Mineral/Rock
Basalt Porphyry (Porphyritic Basalt) — igneous

Basalt Porphyry

Porphyritic Basalt

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Limonite (Iron Ore) (Hydrous Iron Oxide (goethite, lepidocrocite)) — Mineral

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Mineral
Chert (Nodular Chert) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Nodular Chert)

Microcrystalline Silica (SiO2)

sedimentary
Tufa (Vesicular Limestone) (Tufa (form of Calcium Carbonate, CaCO3)) — sedimentary

Tufa (Vesicular Limestone)

Tufa (form of Calcium Carbonate, CaCO3)

sedimentary
Slate (Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)) — metamorphic

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

metamorphic
Diabase (Greenstone) (Diabase (Dolerite)) — igneous

Diabase (Greenstone)

Diabase (Dolerite)

igneous
Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

igneous
Chert Nodule (with Flint core) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (with Flint core)

Sedimentary Cryptocrystalline Quartz (SiO2)

sedimentary
Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

sedimentary
Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

mineral
Chalk / Sedimentary Limestone (Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock) — sedimentary

Chalk / Sedimentary Limestone

Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock

sedimentary
Granite (Granite) — Igneous

Granite

Granite

Igneous
Chert (specifically a Worked Flint/Knapped Flake) (Chert / Flint (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (specifically a Worked Flint/Knapped Flake)

Chert / Flint (Microcrystalline Quartz, SiO2)

sedimentary
Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

sedimentary
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Basaltic Tuff / Volcanic Breccia (Pyroclastic Breccia / Lithic Tuff) — igneous

Basaltic Tuff / Volcanic Breccia

Pyroclastic Breccia / Lithic Tuff

igneous
Scoria (Vesicular Basaltic Glass) — igneous

Scoria

Vesicular Basaltic Glass

igneous
Red Sandstone (Arenite (with Iron Oxide / Hematite staining)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

sedimentary
Chalcedony (Common Opal/Chert variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

mineral
Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

sedimentary
Granite (Granite (Phaneritic Quartz-Feldspar Felsic Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

igneous
Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral
Ferruginous Sandstone (Sandstone, Iron-rich) — sedimentary

Ferruginous Sandstone

Sandstone, Iron-rich

sedimentary
Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

mineral
Green Calcite (Onyx Marble) (Calcium Carbonate (CaCO3)) — mineral

Green Calcite (Onyx Marble)

Calcium Carbonate (CaCO3)

mineral
Granite Cobble (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

igneous
Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Sandstone (Red Sandstone / River Stone) (Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)) — sedimentary

Sandstone (Red Sandstone / River Stone)

Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)

sedimentary
Red Jasper (Quartzite conglomerate) (Silicon dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper (Quartzite conglomerate)

Silicon dioxide (SiO2) with Iron inclusions

sedimentary
Iron Meteorite (Siderite (Meteoric Iron-Nickel alloy)) — igneous

Iron Meteorite

Siderite (Meteoric Iron-Nickel alloy)

igneous