Rock Identifier

Category

Mineral, Often A Rock Given Its Aggregate Nature

Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.

Learn about Mineral, Often A Rock Given Its Aggregate Nature in the encyclopedia

Bumblebee Jasper

Bumblebee Jasper

Skarn

Serpentinite

Lamprophyre

Pyroxenite

Aquamarine Matrix

Aquamarine Matrix

Peacock Ore

Rock Salt

Black Shale

Potassium Feldspar

Potassium Feldspar

Metaconglomerate

Metaconglomerate

Green Marble

Jasper (Silicon Dioxide (SiO2), microcrystalline quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2), microcrystalline quartz

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Granite (River-worn Pebble) (Phaneritic Igneous Rock (Granitic composition)) — igneous

Granite (River-worn Pebble)

Phaneritic Igneous Rock (Granitic composition)

Quartzite with vugs/druzy quartz (Crystalline Silicon Dioxide (SiO2)) — metamorphic

Quartzite with vugs/druzy quartz

Crystalline Silicon Dioxide (SiO2)

Iron-stained Quartzite (Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)) — metamorphic

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Greywacke with Quartz Vein (Greywacke (immature sandstone) with SiO2 inclusions) — sedimentary

Greywacke with Quartz Vein

Greywacke (immature sandstone) with SiO2 inclusions

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Chert (Flint Nobule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

River Stone (likely Siltstone or fine-grained Sandstone) (Clastic Sedimentary Rock (Lithic Wacke / Siltstone)) — sedimentary

River Stone (likely Siltstone or fine-grained Sandstone)

Clastic Sedimentary Rock (Lithic Wacke / Siltstone)

Sandstone (Sandstone (lithified sand)) — sedimentary

Sandstone

Sandstone (lithified sand)

Amygdaloidal Basalt (Amygdaloidal Mafic Volcanic Rock) — igneous

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

Tourmaline (Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)) — mineral

Tourmaline

Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)

Fancy Jasper (Butterfly Carving) (Silicon Dioxide (SiO2) with iron and manganese inclusions) — sedimentary

Fancy Jasper (Butterfly Carving)

Silicon Dioxide (SiO2) with iron and manganese inclusions

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Rose Quartz (Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Cubic Zirconia (CZ) Jewelry (Zirconium dioxide (ZrO2)) — mineral (synthetic)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

mineral (synthetic)

Coquina (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chrysocolla (Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Pebble (Lithic fragment / Sedimentary clast) — sedimentary

Pebble

Lithic fragment / Sedimentary clast

Yellow Jasper (Cryptocrystalline Quartz (SiO2 with Iron inclusions)) — sedimentary

Yellow Jasper

Cryptocrystalline Quartz (SiO2 with Iron inclusions)

Sandstone (Calcareous) (Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)) — sedimentary

Sandstone (Calcareous)

Clastic sedimentary rock (primarily SiO2 with CaCO3 cement)

Dyed Agate (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Peridot (Olivine (Mg,Fe)2SiO4) — Mineral

Peridot

Olivine (Mg,Fe)2SiO4

Quartz / Quartzite (Silicon Dioxide (SiO2)) — mineral

Quartz / Quartzite

Silicon Dioxide (SiO2)

Native Silver Nugget (Silver (Ag)) — mineral

Native Silver Nugget

Silver (Ag)

Vesicular Basalt (Extrusive mafic igneous rock (Basalt with vesicular texture)) — igneous

Vesicular Basalt

Extrusive mafic igneous rock (Basalt with vesicular texture)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Fossiliferous Limestone (Limestone (composed primarily of calcite with included fossils CaCO3)) — Sedimentary

Fossiliferous Limestone

Limestone (composed primarily of calcite with included fossils CaCO3)

Vesicular Basalt / Scoria pebble (Extrusive igneous rock with amygdaloidal infilling) — igneous

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Basalt with Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Phenocrysts

Porphyritic Basalt

Sandstone with Quartz Veins (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone with Quartz Veins

Arenite (primarily SiO2 with Fe2O3 staining)

Howlite (Howlite (Calcium borosilicate hydroxide: Ca2B5SiO9(OH)5)) — mineral

Howlite

Howlite (Calcium borosilicate hydroxide: Ca2B5SiO9(OH)5)

Ferruginous Sandstone (Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))) — sedimentary

Ferruginous Sandstone

Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))