Rock Identifier

Category

Mineral (Man Made Composite)

Browse mineral (man made composite) specimens identified by the Rock Identifier community.

Arsenopyrite with Quartz (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Quartz

Arsenopyrite (FeAsS)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Green Aventurine (SiO2) — mineral

Green Aventurine

SiO2

Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Red Sandstone (Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)) — sedimentary

Red Sandstone

Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)

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

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Diamond (Natural Diamond (Carbon, C)) — mineral

Diamond

Natural Diamond (Carbon, C)

Chalcedony in Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Diamond (in jewelry setting) (Cubic Carbon (C)) — mineral

Diamond (in jewelry setting)

Cubic Carbon (C)

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Marble (Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)) — metamorphic

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Rhodolite Garnet (Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)) — mineral

Rhodolite Garnet

Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)

Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

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

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Fluorite Tower (Calcium Fluoride (CaF2)) — mineral

Fluorite Tower

Calcium Fluoride (CaF2)

Fluorite (Rainbow Fluorite) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Rainbow Fluorite)

Fluorite (Calcium Fluoride, CaF2)

Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Quartz (Milky/Gray variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Gray variety)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone (Red) (Arenite (primarily Quartz, SiO2, with Iron Oxide cement)) — sedimentary

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Ironstone Concretion (Limonite/Hematite Nodules) (Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)) — sedimentary

Ironstone Concretion (Limonite/Hematite Nodules)

Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Banded Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)) — sedimentary

Banded Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

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

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads) (Chalcedony (SiO2), Jasper (SiO2 with impurities)) — Mineral (specifically a cryptocrystalline variety of Quartz)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Mineral (specifically a cryptocrystalline variety of Quartz)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Vesicular Basalt with Amygdaloidal Infill (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Vesicular Basalt with Amygdaloidal Infill

Basalt (Mafic Extrusive Igneous Rock)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment) (Quartz (SiO₂)) — Mineral

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Quartzite (Coldwater or Druzy Quartz over Quartzite) (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite (Coldwater or Druzy Quartz over Quartzite)

SiO2 (Silicon Dioxide)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Satin Spar Selenite (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (CaSO4·2H2O)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Chalcopyrite in Quartz (Gold Ore Matrix) (CuFeS2 (Chalcopyrite) with SiO2 (Quartz)) — mineral

Chalcopyrite in Quartz (Gold Ore Matrix)

CuFeS2 (Chalcopyrite) with SiO2 (Quartz)

Yellow Ocher (Limonite) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Yellow Ocher (Limonite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Chert (Serpentinized) (Silicon Dioxide (SiO2) with mineral staining) — sedimentary

Chert (Serpentinized)

Silicon Dioxide (SiO2) with mineral staining

Quartzite (Quartzite (Primary mineral: Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Picture Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with mineral inclusions