Rock Identifier

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Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary
Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

mineral
Jasper Shard / Chert (Silicon dioxide (SiO2)) — sedimentary

Jasper Shard / Chert

Silicon dioxide (SiO2)

sedimentary
Peridot (Olivine (Mg,Fe)2SiO4) — Mineral

Peridot

Olivine (Mg,Fe)2SiO4

Mineral
Granitoid (Granite/Diorite) (Course-grained Plutonic Igneous Rock) — igneous

Granitoid (Granite/Diorite)

Course-grained Plutonic Igneous Rock

igneous
Moonstone (Feldspar variety) (Orthoclase Feldspar (KAlSi3O8)) — mineral

Moonstone (Feldspar variety)

Orthoclase Feldspar (KAlSi3O8)

mineral
Native Copper with Cuprite and Quartz (Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)) — mineral

Native Copper with Cuprite and Quartz

Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)

mineral
Granite or Pegmatite with Mica (Granitoid) — igneous

Granite or Pegmatite with Mica

Granitoid

igneous
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Chert (Nodule) (Chert (SiO2)) — sedimentary

Chert (Nodule)

Chert (SiO2)

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

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2

mineral
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Gneiss (likely) (Gneiss) — Metamorphic

Gneiss (likely)

Gneiss

Metamorphic
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Carnelian (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

mineral
Imperial Jasper (Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions) — Sedimentary

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Sedimentary
Basalt (Basalt (composition of plagioclase feldspar, pyroxene, and olivine)) — igneous

Basalt

Basalt (composition of plagioclase feldspar, pyroxene, and olivine)

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

Breccia

Breccia (Clastic Sedimentary Rock)

sedimentary
Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary
Moss Agate (Chalcedony (Silicon Dioxide) with inclusions - SiO2) — mineral

Moss Agate

Chalcedony (Silicon Dioxide) with inclusions - SiO2

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

mineral
Gold Ore (Native Gold (Au)) — mineral

Gold Ore

Native Gold (Au)

mineral
Yellow Jasper (Iron-stained Chert) (Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions) — sedimentary

Yellow Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions

sedimentary
Chert (Chert Nodule with Cortex) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chert Nodule with Cortex)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Dalmatian Stone (Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)) — igneous

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

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

Blue Calcite

Calcium Carbonate (CaCO3)

mineral
Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

mineral
Banded Black Onyx (Chalcedony) (Silicon Dioxide (SiO₂)) — mineral

Banded Black Onyx (Chalcedony)

Silicon Dioxide (SiO₂)

mineral
Hematite (Hematite (Fe2O3)) — Mineral

Hematite

Hematite (Fe2O3)

Mineral
Basalt with Quartz Vein and Weathering Crust (Amygdaloidal or Porphyritic Basalt) — igneous

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

igneous
Agate (Carnelian / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

mineral
Sunstone (Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)

mineral
Granite (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite

Granite (Felsic Intrusive Igneous Rock)

igneous
Granite (Granite (a common igneous rock)) — igneous

Granite

Granite (a common igneous rock)

igneous
Jasper with Quartz inclusions (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) with impurities

sedimentary
Amethyst (Amethyst (variety of Quartz, SiO2)) — mineral

Amethyst

Amethyst (variety of Quartz, SiO2)

mineral
Blue Chalcedony (likely dyed) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Blue Chalcedony (likely dyed)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

mineral
Limestone (with Iron-Oxide staining) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

sedimentary
Blue Quartz (specifically Dumortierite Quartz) (SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)) — mineral

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Chert (specifically Red Chert/Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert/Jasper variety)

Silicon Dioxide (SiO2)

sedimentary