Rock Identifier

Category

Mineral (Man Made Composite)

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

Marble (Recrystallized Calcite / Dolomite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Sandstone (likely Arkosic) (Clastic Sedimentary Rock) — sedimentary

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Amber (Raw) (Succinite (Fossilized Resin)) — mineraloid

Amber (Raw)

Succinite (Fossilized Resin)

Mahogany Obsidian (Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)

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

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz with Iron Stains (Quartz (SiO2) with iron oxide/hydroxide staining) — Mineral

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Beryllonite (Beryllonite (NaBePO4)) — mineral

Beryllonite

Beryllonite (NaBePO4)

Basalt with Secondary Mineral Inclusions (Amygdaloidal Basalt (Mafic volcanic rock, primarily Augite and Plagioclase)) — igneous

Basalt with Secondary Mineral Inclusions

Amygdaloidal Basalt (Mafic volcanic rock, primarily Augite and Plagioclase)

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

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Septarian Nodule (Septarian Concretion (CaCO3 with Siderite/Limonite streaks)) — sedimentary

Septarian Nodule

Septarian Concretion (CaCO3 with Siderite/Limonite streaks)

Dyed Dalmatian Jasper (Dalmatian Stone) (Perthitic Feldspar with Arfvedsonite inclusions) — igneous

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Limonite Concretion (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — sedimentary

Limonite Concretion

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Quartz Grain (Silicon Dioxide (SiO2)) — mineral

Quartz Grain

Silicon Dioxide (SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Rock Salt (Halite) (Halite (Sodium Chloride, NaCl)) — mineral

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

Laterite (Laterite (Ferricrete)) — sedimentary

Laterite

Laterite (Ferricrete)

Sandstone (likely Quartzose Sandstone with mineral staining) (Arenite (composed mainly of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Satin Spar Gypsum (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — Mineral

Satin Spar Gypsum

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Quartz (specifically Milky Quartz/Quartzite) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically Milky Quartz/Quartzite)

Silicon Dioxide (SiO2)

Muscovite Mica (Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))) — Mineral

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

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

Sandstone

Arenite (composed primarily of SiO2)

Greasy Quartz (likely carved Milky Quartz or Aventurine) (Silicon Dioxide (SiO2)) — mineral

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

River Cobble (Gneiss/Schist mix) (Foliated Metamorphic Rock (Gneissic/Schistose)) — metamorphic

River Cobble (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneissic/Schistose)

Greenschist / Migmatite (Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)) — metamorphic

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

Amber (Amber (Amorphous Organic Hydrocarbon)) — mineral

Amber

Amber (Amorphous Organic Hydrocarbon)

Lapis Lazuli (Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Vesicular Basalt (Amygdaloidal) (Amygdaloidal Basalt) — igneous

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt

Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone. (SiO2 (Silicon Dioxide)) — Mineral or Sedimentary (if chert)

Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.

SiO2 (Silicon Dioxide)

Mineral or Sedimentary (if chert)

Sandstone (with Chert/Quartzite) (Arenite (primarily SiO2)) — sedimentary

Sandstone (with Chert/Quartzite)

Arenite (primarily SiO2)

Gneissic Schist (Foliated Metamorphic Rock (Schist/Gneiss transition)) — metamorphic

Gneissic Schist

Foliated Metamorphic Rock (Schist/Gneiss transition)

Phantom Quartz (Chlorite Inclusion) (Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8) — mineral

Phantom Quartz (Chlorite Inclusion)

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8

Quartz Chip (Silicon Dioxide (SiO2)) — mineral

Quartz Chip

Silicon Dioxide (SiO2)

Snowflake Obsidian (Volcanic Glass with Spherulitic Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic Glass with Spherulitic Cristobalite (SiO2)

Basalt with Calcite Veining (Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Basalt with Calcite Veining

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Dalmatian Stone (Dalmatian Jasper / Feldspathic Igneous Rock) — igneous

Dalmatian Stone

Dalmatian Jasper / Feldspathic Igneous Rock

Granite (Granite (Alkali-feldspar granite)) — igneous

Granite

Granite (Alkali-feldspar granite)

Sandstone (with potentially metamorphic or basaltic bands) (Arenite / Lithic Wacke) — sedimentary

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke