Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Jasper with Quartz Druzy (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz Druzy

Silicon Dioxide (SiO2)

sedimentary
Asphalt (Road Aggregate) (Asphalt concrete / Bituminous mixture) — anthropogenic sedimentary (technolith)

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

anthropogenic sedimentary (technolith)
Chert / Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline Quartz (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Zoisite with Ruby (Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)) — metamorphic

Zoisite with Ruby

Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)

metamorphic
Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

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

Gold Nugget (Placer Gold)

Native Gold (Au)

mineral
Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

sedimentary
Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

mineral
River Siltstone Pebble (Siltstone (primarily composed of silica and clay minerals)) — sedimentary

River Siltstone Pebble

Siltstone (primarily composed of silica and clay minerals)

sedimentary
Belemnoit (Fossil) (Belemnoidea (Order), Rostrum / Guard) — sedimentary

Belemnoit (Fossil)

Belemnoidea (Order), Rostrum / Guard

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
River Pebble (Likely Quartzite or Chert) (Silicon Dioxide (SiO2)) — metamorphic or sedimentary

River Pebble (Likely Quartzite or Chert)

Silicon Dioxide (SiO2)

metamorphic or sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

mineral
Granite (Weathered) (Granitic intrusive rock) — igneous

Granite (Weathered)

Granitic intrusive rock

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

Chert Pebble

Microcrystalline Quartz (SiO2)

sedimentary
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Sandstone (Arenite (SiO2 dominant)) — sedimentary

Sandstone

Arenite (SiO2 dominant)

sedimentary
Yellow Howlite (Dyed Magnesite/Howlite) (Dyed Ca2B5SiO9(OH)5 (Howlite) or MgCO3 (Magnesite)) — mineral

Yellow Howlite (Dyed Magnesite/Howlite)

Dyed Ca2B5SiO9(OH)5 (Howlite) or MgCO3 (Magnesite)

mineral
Granite (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite

Granite (Phaneritic intrusive igneous rock)

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

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

mineral
Rose Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Rose Quartz

Quartz (Silicon Dioxide - SiO2)

mineral
Limestone (Weathered) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Weathered)

Calcium Carbonate (CaCO3)

sedimentary
Angelite (Anhydrite (Calcium Sulfate, CaSO4)) — mineral

Angelite

Anhydrite (Calcium Sulfate, CaSO4)

mineral
Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

metamorphic
Quartz (Quartzite or Quartz Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Quartz (Quartzite or Quartz Pebble)

Silicon Dioxide (SiO2)

metamorphic
Limonite with Opal infusion (FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)) — mineral

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

mineral
Amazonite (Microcline (variety Amazonite), K(AlSi3O8)) — mineral

Amazonite

Microcline (variety Amazonite), K(AlSi3O8)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Blue Lace Agate (Chalcedony (SiO2) with trace impurities) — mineral

Blue Lace Agate

Chalcedony (SiO2) with trace impurities

mineral
Agate Geode (Microcrystalline Quartz (SiO2)) — mineral

Agate Geode

Microcrystalline Quartz (SiO2)

mineral
Opalite (Synthetic Moonstone/Opal) (Synthetic Silica Glass) — mineraloid (synthetic)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

mineraloid (synthetic)
Jasper (Jasper (Silica/Quartz) - SiO2) — mineral

Jasper

Jasper (Silica/Quartz) - SiO2

mineral
Ocean Jasper (Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)) — sedimentary

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)

sedimentary
Blue Lace Agate (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

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

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Jasper (with Agate/Chalcedony inclusions) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (with Agate/Chalcedony inclusions)

Silicon Dioxide (SiO2)

sedimentary
Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Fossiliferous Limestone (Coquina) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

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

Petrified Wood

Silicified Wood (SiO2)

metamorphic