Rock Identifier

Category

Not A Geological Specimen

Browse not a geological specimen specimens identified by the Rock Identifier community.

Learn about Not A Geological Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Transvaal Jade

Decorative polished pebbles (Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt) — mineral

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Vein Quartz in Basalt (Silicate-veined volcanic rock) — igneous

Vein Quartz in Basalt

Silicate-veined volcanic rock

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

Granite River Pebble

Granite (Phaneritic Igneous Rock)

Waterworn Pebble / Quartzite (Metamorphic/Sedimentary rock fragment) — sedimentary

Waterworn Pebble / Quartzite

Metamorphic/Sedimentary rock fragment

Fossilized Brain Coral (Diploria labyrinthiformis (Fossilized)) — sedimentary

Fossilized Brain Coral

Diploria labyrinthiformis (Fossilized)

Ironstone / Hematite Concretion (Iron oxide / Fe2O3) — sedimentary

Ironstone / Hematite Concretion

Iron oxide / Fe2O3

Limestone Concretion (Calcium Carbonate Concretion (CaCO3)) — sedimentary

Limestone Concretion

Calcium Carbonate Concretion (CaCO3)

Chert Nodule (Microcrystalline quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline quartz (SiO2)

Graphic Granite (Alkali feldspar and quartz intergrowth) — igneous

Graphic Granite

Alkali feldspar and quartz intergrowth

Flint in Chalk (Silicon dioxide nodules in microcrystalline calcium carbonate) — sedimentary

Flint in Chalk

Silicon dioxide nodules in microcrystalline calcium carbonate

Quartz Grain (Silicon Dioxide (SiO2)) — mineral

Quartz Grain

Silicon Dioxide (SiO2)

Quartz-veined Basalt or Diabase Pebble (Igneous rock with hydrothermal quartz vein) — igneous

Quartz-veined Basalt or Diabase Pebble

Igneous rock with hydrothermal quartz vein

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Mixed rock and mineral collection (Multiple specimens; visible examples may include quartz (SiO₂), amethyst (quartz), calcite (CaCO₃), and dark mafic rocks) — mineral

Mixed rock and mineral collection

Multiple specimens; visible examples may include quartz (SiO₂), amethyst (quartz), calcite (CaCO₃), and dark mafic rocks

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Fossilized Coral (Anthozoa) — fossil

Fossilized Coral

Anthozoa

Conglomerate (Greenstone/Pebble Conglomerate) (Polymictic Conglomerate) — sedimentary

Conglomerate (Greenstone/Pebble Conglomerate)

Polymictic Conglomerate

Calamites Fossil (Horsetail Stem) (Calamites (Genus), part of the class Equisetopsida) — sedimentary

Calamites Fossil (Horsetail Stem)

Calamites (Genus), part of the class Equisetopsida

Limonite/Goethite Iron Concretion (Hydrated iron oxide-hydroxide mixture (FeO(OH)·nH2O)) — mineral

Limonite/Goethite Iron Concretion

Hydrated iron oxide-hydroxide mixture (FeO(OH)·nH2O)

Blue Schist / Lydian Stone / Chert with Glaucophane (Metamorphic rock containing quartz and glaucophane) — metamorphic

Blue Schist / Lydian Stone / Chert with Glaucophane

Metamorphic rock containing quartz and glaucophane

Polished green stone, likely serpentine or altered basalt (Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing) — metamorphic

Polished green stone, likely serpentine or altered basalt

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing

Muscovite Schist (Metamorphic rock rich in muscovite mica) — metamorphic

Muscovite Schist

Metamorphic rock rich in muscovite mica

Mica Schist with Vein (Mica Schist) — metamorphic

Mica Schist with Vein

Mica Schist

Banded Sedimentary Rock (Sedimentary rock with Liesegang banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with Liesegang banding

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Agate Geode (Silicon Dioxide (Chalcedony / Quartz), SiO2) — sedimentary

Agate Geode

Silicon Dioxide (Chalcedony / Quartz), SiO2

Fossil Coral (Cnidaria Anthozoa (Fossilized)) — sedimentary

Fossil Coral

Cnidaria Anthozoa (Fossilized)

Limonite (Ironstone Concretion) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite (Ironstone Concretion)

Hydrous ferric oxides (FeO(OH)·nH2O)

Quartz-veined Quartzite or Basalt (Metamorphic rock with quartz veins (SiO2)) — metamorphic

Quartz-veined Quartzite or Basalt

Metamorphic rock with quartz veins (SiO2)

Jasper (Microcrystalline quartz, SiO2) — sedimentary

Jasper

Microcrystalline quartz, SiO2

Green Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Jasper in Quartz / Brecciated Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Jasper in Quartz / Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Pyrite Schist (Metamorphic rock containing FeS2 (Pyrite) with mica and quartz) — metamorphic

Pyrite Schist

Metamorphic rock containing FeS2 (Pyrite) with mica and quartz

Metal Alloy (Likely Pewter or Sterling Silver) (Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).) — Man-made material (metal)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Man-made material (metal)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (Microcrystalline quartz, SiO2)) — sedimentary

Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (Microcrystalline quartz, SiO2)) — mineral

Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Porphyritic Igneous Pebble (Porphyritic Basalt or Rhyolite) — igneous

Porphyritic Igneous Pebble

Porphyritic Basalt or Rhyolite