Rock Identifier

Category

Mineral, Part Of A Rock

Browse mineral, part of a rock specimens identified by the Rock Identifier community.

Learn about Mineral, Part Of A Rock in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Halite

Dolomite

Gypsum

Coal

Claystone

Particolored Tourmaline

Serpentinite

Carbonatite

Skarn

Schist

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Quartz Vein in Sedimentary Rock (Silicon Dioxide (SiO2) with host Chert or Limestone) — mineral

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Quartz Vein in Host Rock (Pebble) (Quartz (SiO2) with sandstone or siltstone matrix) — metamorphic/igneous transition

Quartz Vein in Host Rock (Pebble)

Quartz (SiO2) with sandstone or siltstone matrix

metamorphic/igneous transition

Painted Sandstone Cobble (Clastic Sedimentary Rock (Sandstone base)) — sedimentary

Painted Sandstone Cobble

Clastic Sedimentary Rock (Sandstone base)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Tafoni Weathered) (Arenite (part of the Sandstone family)) — sedimentary

Sandstone (Tafoni Weathered)

Arenite (part of the Sandstone family)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Migmatite (Migmatite (Mixed Rock)) — metamorphic

Migmatite

Migmatite (Mixed Rock)

Chert with Calcite Veins (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions) — sedimentary

Chert with Calcite Veins

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions

Uncertain small pale mineral fragment (Indeterminate; possibly calcite or a light-colored feldspar fragment) — mineral

Uncertain small pale mineral fragment

Indeterminate; possibly calcite or a light-colored feldspar fragment

Weathered granite pebble (Granitic rock, primarily quartz, feldspar, and biotite/hornblende) — igneous

Weathered granite pebble

Granitic rock, primarily quartz, feldspar, and biotite/hornblende

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Granite (Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)) — igneous

Granite

Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)

Granite (Intrusive igneous rock (Granite)) — igneous

Granite

Intrusive igneous rock (Granite)

Amygdaloidal Basalt (Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)

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

Quartz Pebble (Grit)

Silicon Dioxide (SiO2)

Small quartz-rich rock fragment (Likely quartz (SiO₂), possibly a pale granite or feldspar-bearing fragment) — mineral

Small quartz-rich rock fragment

Likely quartz (SiO₂), possibly a pale granite or feldspar-bearing fragment

Painted Rock (Weathered Sedimentary Rock (Painted)) — sedimentary

Painted Rock

Weathered Sedimentary Rock (Painted)

Polished opal-bearing rock (likely boulder opal) (Opal, hydrated amorphous silica (SiO₂·nH₂O), in ironstone or host rock) — gemstone

Polished opal-bearing rock (likely boulder opal)

Opal, hydrated amorphous silica (SiO₂·nH₂O), in ironstone or host rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Intrusive igneous felsic rock) — igneous

Granite

Intrusive igneous felsic rock

Granite (Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)) — igneous

Granite

Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)

Unknown Rock Fragment (Undetermined) — igneous

Unknown Rock Fragment

Undetermined

Granite (Granite) — igneous

Granite

Granite

Rounded yellow-brown cobble (Likely weathered sandstone or quartz-rich conglomeratic clast; exact identification requires a fresh surface and testing) — sedimentary

Rounded yellow-brown cobble

Likely weathered sandstone or quartz-rich conglomeratic clast; exact identification requires a fresh surface and testing

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Granite

Phaneritic Felsic Intrusive Igneous Rock

Fossilized Sea Urchin (Echinoid) (Echinoidea (Class) - likely replaced by Calcite or Quartz) — sedimentary

Fossilized Sea Urchin (Echinoid)

Echinoidea (Class) - likely replaced by Calcite or Quartz

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Mica and Pyrite (Quartz (SiO2) with Muscovite (KAl2(AlSi3O10)(OH)2) and Pyrite (FeS2)) — mineral

Milky Quartz with Mica and Pyrite

Quartz (SiO2) with Muscovite (KAl2(AlSi3O10)(OH)2) and Pyrite (FeS2)

Lichen-covered granite or granitic gneiss (Granite: quartz + feldspar + mica; possibly gneiss if foliation is confirmed) — igneous

Lichen-covered granite or granitic gneiss

Granite: quartz + feldspar + mica; possibly gneiss if foliation is confirmed

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Goethite / Limonite Gossan (Goethite, FeO(OH)) — mineral

Goethite / Limonite Gossan

Goethite, FeO(OH)

Granite (Granite (Plutonic Igneous Rock)) — igneous

Granite

Granite (Plutonic Igneous Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Polished Slab) (Granite (Plutonic Igneous Rock)) — igneous

Granite (Polished Slab)

Granite (Plutonic Igneous Rock)

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

Granite Pebble

Granite (Phaneritic intrusive igneous rock)