Rock Identifier

Community gallery

All rocks & minerals

Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.

Granite (Phaneritic plutonic igneous rock (SiO2 range 65-75%)) — igneous

Granite

Phaneritic plutonic igneous rock (SiO2 range 65-75%)

igneous
Gneiss (likely Granitic Gneiss) (Gneiss) — metamorphic

Gneiss (likely Granitic Gneiss)

Gneiss

metamorphic
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Jasper Beads (Polished) (Silicon Dioxide (SiO2)) — sedimentary

Jasper Beads (Polished)

Silicon Dioxide (SiO2)

sedimentary
Black Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Black Jasper

Silicon Dioxide (SiO2) with impurities

sedimentary
Chert Pebble with Inclusion (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble with Inclusion

Microcrystalline Quartz (SiO2)

sedimentary
Carnelian (Red Agate) (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (Red Agate)

Silicon dioxide (SiO2) with iron oxide impurities

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

Yellow Jasper

Silicon Dioxide (SiO2)

sedimentary
Quartzite pebble (Quartzite) — metamorphic

Quartzite pebble

Quartzite

metamorphic
Shungite (Non-crystalline carbon (Fullerene-bearing)) — mineral

Shungite

Non-crystalline carbon (Fullerene-bearing)

mineral
Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

igneous
River Pebble (Quartzite) (Quartzite (SiO2)) — metamorphic

River Pebble (Quartzite)

Quartzite (SiO2)

metamorphic
Chert (Flint Pebbles) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Pebbles)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Yellow Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Yellow Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral
Fossiliferous Limestone (Limestone with embedded fossil cross-section) — sedimentary

Fossiliferous Limestone

Limestone with embedded fossil cross-section

sedimentary
Quartz with inclusions (SiO2) — mineral

Quartz with inclusions

SiO2

mineral
Granite (Phaneritic intrusive igneous rock) — igneous

Granite

Phaneritic intrusive igneous rock

igneous
Yellow Jasper (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

sedimentary
Carnelian Agate / Iron-Stained Quartz (SiO2) — Mineral

Carnelian Agate / Iron-Stained Quartz

SiO2

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary
Porphyritic Andesite/Basalt or Diorite River Rock (Porphyritic Igneous Rock) — Igneous

Porphyritic Andesite/Basalt or Diorite River Rock

Porphyritic Igneous Rock

Igneous
Yellow Jasper (Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

sedimentary
Quartz with Muscovite Mica (Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]) — mineral

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

mineral
Sunstone (Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)) — mineral

Sunstone

Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)

mineral
Granite Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Granite Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic
Basalt River Cobble (Basalt) — igneous

Basalt River Cobble

Basalt

igneous
Granite Pebble (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite Pebble

Phaneritic Felsic Igneous Rock (Granite)

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

Chalcedony (Carnelian Agate pebble)

Silicon Dioxide (SiO2)

mineral
Jasper with Quartz Veins (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Quartz Veins

Silicon Dioxide (SiO2) with impurities

sedimentary
Petoskey Stone (Hexagonaria percarinata) — sedimentary

Petoskey Stone

Hexagonaria percarinata

sedimentary
Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

sedimentary
Diorite (Diorite) — igneous

Diorite

Diorite

igneous
Fossiliferous Limestone (Carbonate Rock (CaCO3 with organic inclusions)) — sedimentary

Fossiliferous Limestone

Carbonate Rock (CaCO3 with organic inclusions)

sedimentary
Yellow Jasper (Silicon Dioxide (SiO2) with Iron Oxide impurities) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Iron Oxide impurities

sedimentary
Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

sedimentary
Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

mineral
Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

mineral
Quartzite Pebble (Metamorphic rock predominantly composed of Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

metamorphic
Graphic Granite (Pegmatitic Feldspar and Quartz (Graphic Granite)) — igneous

Graphic Granite

Pegmatitic Feldspar and Quartz (Graphic Granite)

igneous