Rock Identifier

Category

Not A Rock

Browse not a rock specimens identified by the Rock Identifier community.

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

Granite

Intrusive igneous rock (SiO2 range 65-75%)

Basalt with Iron Oxidation (Mafic Igneous Basalt) — igneous

Basalt with Iron Oxidation

Mafic Igneous Basalt

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Basalt with Porphyritic Texture (Porphyritic Basalt) — igneous

Basalt with Porphyritic Texture

Porphyritic Basalt

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

Quartzite with Quartz Vein (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Quartz Vein

Quartzite (primarily SiO2)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Pink Granite (Phaneritic Plutonic Rock (Granite with K-Feldspar)) — igneous

Pink Granite

Phaneritic Plutonic Rock (Granite with K-Feldspar)

Granodiorite (Riverbed Cobble) (Granodiorite) — igneous

Granodiorite (Riverbed Cobble)

Granodiorite

Basalt River Pebble (Extrusive mafic igneous rock; primarily composed of Plagioclase Feldspar and Pyroxene) — Igneous

Basalt River Pebble

Extrusive mafic igneous rock; primarily composed of Plagioclase Feldspar and Pyroxene

Chert (specifically Flint or Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline Quartz (SiO2)

Vesicular Basalt (Scoria) (Basalt (Extrusive Igneous Rock)) — igneous

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Basalt (Extrusive Mafic Igneous Rock) — igneous

Basalt

Extrusive Mafic Igneous Rock

Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

mineral / metamorphic

Granite (Phaneritic Plutonic Felsic Rock) — igneous

Granite

Phaneritic Plutonic Felsic Rock

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

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Scoria (Lava Rock) (Scoria (Vesicular Basalt)) — igneous

Scoria (Lava Rock)

Scoria (Vesicular Basalt)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Chrysocolla in Matrix (Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix) — mineral

Chrysocolla in Matrix

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix

Limestone (Calcareous sedimentary rock (primarily CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (primarily CaCO3)

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles (Mixed gemstones (primarily Silicon Dioxide - SiO2)) — mineral

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Scoria (Vesicular Basalt) (Scoria (Extrusive Igneous Rock)) — igneous

Scoria (Vesicular Basalt)

Scoria (Extrusive Igneous Rock)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Basalt (Vesicular) (Vesicular Basalt) — Igneous

Basalt (Vesicular)

Vesicular Basalt

Mica Schist (Mica Schist (predominantly Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Granite (Granite (a common type of Felsic Intrusive Igneous Rock)) — Igneous Rock

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Carnelian and White Quartz Bracelet (Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz) — mineral

Carnelian and White Quartz Bracelet

Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz

Flowerstone (Porphyritic Basalt or Porphyritic Andesite) — igneous

Flowerstone

Porphyritic Basalt or Porphyritic Andesite

Gneiss (Granitic Gneiss) (Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Scoria (Vesicular Basalt) (Scoria (Vesicular Igneous Rock)) — igneous

Scoria (Vesicular Basalt)

Scoria (Vesicular Igneous Rock)

Unakite (Epidotized Granite) (Epidote-Feldspar-Quartz Rock) — metamorphic

Unakite (Epidotized Granite)

Epidote-Feldspar-Quartz Rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Vesicular Basalt (Iron-Stained) (Mafic Volcanic Rock (Basalt)) — igneous

Vesicular Basalt (Iron-Stained)

Mafic Volcanic Rock (Basalt)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (SiO2 + Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

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

Granite

Granite (a common igneous rock)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Serpentine (variety: Serpentine Rock) (Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine (variety: Serpentine Rock)

Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Shale (with Iron Oxide staining) (Fissile Mudstone (primarily Quartz and Clay minerals)) — sedimentary

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)