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

View all →

Bumblebee Jasper

Skarn

Serpentinite

Lamprophyre

Pyroxenite

Aquamarine Matrix

Peacock Ore

Rock Salt

Black Shale

Potassium Feldspar

Metaconglomerate

Green Marble

Pyrite

Iron Sulfide (FeS2)

mineral

Basalt Pebble

Extrusive Mafic Igneous Rock

igneous

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

sedimentary

Green Druzy Quartz (Prasiolite)

Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)

mineral

Jasper

Microcrystalline Quartz (SiO2)

sedimentary

Green Quartz (Prasiolite)

Silicon Dioxide (SiO2) with trace impurities

mineral

Native Gold in Quartz

Native Gold (Au)

mineral

Sandstone

Sandstone (composed mainly of Quartz, SiO2, and Feldspar)

sedimentary

Opalite

Synthetic Opalised Glass

glass

Quartzite pebble

Crystalline silica (SiO2)

metamorphic

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Manufactured Glass (Simulant)

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

sedimentary

Basalt

Igneous

Pebble

Clast (specifically a granule or small pebble)

Sedimentary

Chrysoprase

Chalcedony (cryptocrystalline quartz) with nickel inclusions; SiO2

Mineral

Jasper

Microcrystalline Quartz (SiO2)

sedimentary

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Synthetic / Textile

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

sedimentary

Scoria

Scoria (a vesicular basalt or andesite)

igneous

Agate (Dyed Blue)

SiO2 (Silicon Dioxide)

Mineral (Chalcedony/Quartz variety)

Granite

Granite (a felsic intrusive igneous rock)

Igneous

Black Veined Jasper (Spiderweb Jasper)

Silicon Dioxide (SiO2)

sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

sedimentary

Tumbled Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

sedimentary

Banded Agate

Cryptocrystalline Quartz (SiO2)

mineral

Sandstone

Arenite (composed primarily of Quartz, SiO2)

sedimentary

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

mineral

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Sedimentary or Metamorphic (low-grade)

Jasper

Silicon dioxide (SiO2)

sedimentary

Brown Quartzite Pebble

Quartzite (SiO2)

metamorphic

Jasper (likely Iron-stained)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Gold Ore (in Quartz/Gossan matrix)

Native Gold (Au) in Limonite/Quartz matrix

mineral

Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

sedimentary

Chalcedony or Chert/Jasper with secondary mineral staining

SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.

Mineral, potentially a rock with chalcedony/jasper.

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3)

sedimentary

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Sedimentary rock