Rock Identifier

Category

Mineral (Primary Constituent)

Browse mineral (primary constituent) specimens identified by the Rock Identifier community.

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Sandstone (Quartzose Sandstone) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Coarse-grained Granite (Granitoid (KAlSi3O8 + SiO2 + NaAlSi3O8)) — igneous

Coarse-grained Granite

Granitoid (KAlSi3O8 + SiO2 + NaAlSi3O8)

Gold Ore (Auriferous Quartz and Sulfide Mineralization in Host Rock) — igneous

Gold Ore

Auriferous Quartz and Sulfide Mineralization in Host Rock

Chert (specifically Yellow/Honey Jasper variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

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

Milk Quartz (River Pebble)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Diamond (in a Gold Jewelry Setting) (Carbon (C)) — mineral

Diamond (in a Gold Jewelry Setting)

Carbon (C)

Granite (Phaneritic Acidic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Acidic Igneous Rock (Granite)

Shale (Fissile Siliciclastic Sedimentary Rock) — sedimentary

Shale

Fissile Siliciclastic Sedimentary Rock

Malachite (Copper carbonate hydroxide, Cu2CO3(OH)2) — mineral

Malachite

Copper carbonate hydroxide, Cu2CO3(OH)2

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Conglomerate (Conglomerate) — Sedimentary

Conglomerate

Conglomerate

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Quartz Vein / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Fossilized Bone Fragment (Permineralized Skeletal Element (Likely Vertebrate)) — sedimentary

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Milky Quartz with inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Granite Pebbles (Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)) — igneous

Granite Pebbles

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)

Slag (Metallurgical by-product) — Anthropogenic (Man-made material)

Slag

Metallurgical by-product

Anthropogenic (Man-made material)

Tiger's Eye, Hematite, and Black Obsidian Bracelet (SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)) — mineral

Tiger's Eye, Hematite, and Black Obsidian Bracelet

SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)

Rough Green Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Rough Green Calcite

Calcite (Calcium Carbonate, CaCO3)

Sandstone (Red Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)) — sedimentary

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Pegmatite (with Quartz and Feldspar) (Granitic Pegmatite) — igneous

Pegmatite (with Quartz and Feldspar)

Granitic Pegmatite

Lepidolite with Quartz (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite with Quartz

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Stilbite (Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)) — mineral

Stilbite

Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)

Chert (specifically Gray/Black Chert) (Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (specifically Gray/Black Chert)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (Jasper/Flint variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Fluorite in Matrix (Fluorite (CaF2) within a host rock matrix) — Mineral

Fluorite in Matrix

Fluorite (CaF2) within a host rock matrix

Granitic Pegmatite (Granitic Pegmatite (primarily SiO2 with KAlSi3O8)) — igneous

Granitic Pegmatite

Granitic Pegmatite (primarily SiO2 with KAlSi3O8)

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (and Flint)

Silicon Dioxide (SiO2)

Amber (Succinite (Organic Mineraloid)) — mineral

Amber

Succinite (Organic Mineraloid)

Pink Granite Porphyry Cobble (Porphyritic K-Feldspar Granite) — igneous

Pink Granite Porphyry Cobble

Porphyritic K-Feldspar Granite

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)