Rock Identifier

Category

Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Granite (Granite) — igneous

Granite

Granite

igneous
Crushed Limestone (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Crushed Limestone

Sedimentary Carbonate Rock (CaCO3)

sedimentary
Titanium Coated Kyanite (Aura Kyanite) (Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating) — metamorphic

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

metamorphic
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
River Rock (likely Siltstone or fine-grained Sandstone) (Clastic Sedimentary Rock) — sedimentary

River Rock (likely Siltstone or fine-grained Sandstone)

Clastic Sedimentary Rock

sedimentary
Greenstone / Diorite (Intermediate plutonic igneous rock) — igneous

Greenstone / Diorite

Intermediate plutonic igneous rock

igneous
Black Opal (Amorphous Hydrated Silica (SiO2·nH2O)) — mineral

Black Opal

Amorphous Hydrated Silica (SiO2·nH2O)

mineral
Red Quartzite (likely Purple/Red variety) (Quartzite (SiO2)) — metamorphic

Red Quartzite (likely Purple/Red variety)

Quartzite (SiO2)

metamorphic
Diorite (with Salt-and-Pepper Texture) (Diorite (Intrusive Igneous Rock)) — igneous

Diorite (with Salt-and-Pepper Texture)

Diorite (Intrusive Igneous Rock)

igneous
Red Jasper (possibly) (Jasper (a variety of Chalcedony, SiO2)) — Mineral

Red Jasper (possibly)

Jasper (a variety of Chalcedony, SiO2)

Mineral
Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

mineral
Biotite Mica in Host Rock (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Howlite (Howlite (Ca2B5SiO9(OH)5)) — mineral

Howlite

Howlite (Ca2B5SiO9(OH)5)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Green Fluorite

Calcium Fluoride (CaF2)

mineral
Beach Quartz Pebble (Quartz (Silica - SiO2)) — mineral

Beach Quartz Pebble

Quartz (Silica - SiO2)

mineral
Sodalite (Sodalite, Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

mineral
Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

sedimentary
Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

metamorphic
Bauxite (Laterite Clay) (Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))) — sedimentary

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

sedimentary
Rose Quartz (Rose Quartz (SiO₂)) — Mineral

Rose Quartz

Rose Quartz (SiO₂)

Mineral
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts (Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar) — Igneous

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Igneous
Snowflake Obsidian (Volcanic glass with Cristobalite inclusions (70–75% SiO2)) — igneous

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

igneous
Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

mineral
Chert (Common Opal variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Common Opal variant)

Silicon Dioxide (SiO2)

sedimentary
Granite (Weathered/Oxidized) (Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)) — igneous

Granite (Weathered/Oxidized)

Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)

igneous
Jasper (Iron-stained Chalcedony) (SiO2 with Fe2O3 (Iron Oxide) impurities) — Sedimentary / Mineral (Silica)

Jasper (Iron-stained Chalcedony)

SiO2 with Fe2O3 (Iron Oxide) impurities

Sedimentary / Mineral (Silica)
Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

mineral
Quartzite River Cobble (Quartzite (SiO2)) — metamorphic

Quartzite River Cobble

Quartzite (SiO2)

metamorphic
Quartz (likely) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Mineral
Chalcedony (Agate/Jasper mix in host rock) (Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)) — mineral

Chalcedony (Agate/Jasper mix in host rock)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

mineral
Scoria (Extrusive Basaltic Scoria) — igneous

Scoria

Extrusive Basaltic Scoria

igneous
Laterite (Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)) — sedimentary

Laterite

Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)

sedimentary
Red Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Common Green Opal (Hydrated amorphous silicon dioxide (SiO2·nH2O)) — mineral

Common Green Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

mineral
Amygdaloidal Rhyolite (Amygdaloidal felsic extrusive rock) — igneous

Amygdaloidal Rhyolite

Amygdaloidal felsic extrusive rock

igneous
Chert (Jasper-like) (SiO2 (Cryptocrystalline Quartz)) — Sedimentary

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Sedimentary
Stichtite (often found in Serpentinite) (Stichtite Mg6Cr2CO3(OH)16·4H2O) — Mineral

Stichtite (often found in Serpentinite)

Stichtite Mg6Cr2CO3(OH)16·4H2O

Mineral
Garnet (Almandine) (Almandine, Fe3Al2Si3O12) — mineral

Garnet (Almandine)

Almandine, Fe3Al2Si3O12

mineral