Rock Identifier

Category

Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.

Chert (and Flint variant) (Chert (SiO2)) — sedimentary

Chert (and Flint variant)

Chert (SiO2)

Metaconglomerate (Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)) — metamorphic

Metaconglomerate

Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)

Amethyst Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst Quartz

Silicon Dioxide (SiO2) with iron impurities

Gneiss (specifically a granitic gneiss cobble) (Gneiss (high-grade regional metamorphic rock)) — metamorphic

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

Chert (Red/Brown Variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Red/Brown Variety)

Microcrystalline quartz (SiO2)

Mica (Muscovite) (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Mica (Muscovite)

Muscovite (KAl2(AlSi3O10)(OH)2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Desert Varnish on Sandstone (Ferromanganese coating on Quartz Arenite) — sedimentary

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Quartz Crystal Cluster (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Gneiss (likely) (Gneiss) — Metamorphic

Gneiss (likely)

Gneiss

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Scoria (Lava Rock) (Aphanitic vesicular mafic igneous rock) — igneous

Scoria (Lava Rock)

Aphanitic vesicular mafic igneous rock

Conglomerate (Conglomerate (Detrital sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Detrital sedimentary rock)

Citrine (Silicon Dioxide (SiO2) with iron impurities) — Mineral

Citrine

Silicon Dioxide (SiO2) with iron impurities

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

Citrine

Citrine (Silicon Dioxide, SiO2)

Bauxite (Pisolitic Bauxite) (Bauxite (mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Granite (Plutonic felsic igneous rock) — igneous

Granite

Plutonic felsic igneous rock

Sapphire (Corundum variety) (Sapphire (Al₂O₃)) — Mineral

Sapphire (Corundum variety)

Sapphire (Al₂O₃)

Serpentinite (Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)

Sea Glass (often mistaken for Gemstones) (Amorphous Silica (SiO2) with trace additives) — mineraloid

Sea Glass (often mistaken for Gemstones)

Amorphous Silica (SiO2) with trace additives

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Basalt (Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrous ferric oxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Blue Chalcedony (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — Sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Schist (Micaceous) (Mica Schist) — metamorphic

Schist (Micaceous)

Mica Schist

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium Feldspar (KAlSi3O8)

Granite (Granite (Mainly Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (Mainly Quartz, Feldspar, and Mica)

Chert (containing Quartz) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (containing Quartz)

Microcrystalline Silica (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

White Jade (Nephrite) (Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2) — Mineral

White Jade (Nephrite)

Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 inclusions)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 inclusions)

Vesicular Basalt (Basalt (Extrusive Igneous Rock)) — igneous

Vesicular Basalt

Basalt (Extrusive Igneous Rock)

Serpentine (Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)) — metamorphic

Serpentine

Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Black Star Diopside (Diopside (CaMgSi2O6) with Magnetite inclusions) — mineral

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions