Rock Identifier

Category

Mineral, Specifically A Detrital Grain

Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.

Yellow Jasper (SiO2 (Silicon Dioxide)) — sedimentary

Yellow Jasper

SiO2 (Silicon Dioxide)

Chert (specifically a Chert Nodule or Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a Chert Nodule or Flint)

Cryptocrystalline Quartz (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Yellow Diamond (Faceted) (Diamond (C - Pure Carbon)) — mineral

Yellow Diamond (Faceted)

Diamond (C - Pure Carbon)

Amazonite (Potassium Feldspar (KAlSi3O8)) — mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Yellow Agate (Agate (Varietal form of Chalcedony/Quartz, SiO2)) — mineral

Yellow Agate

Agate (Varietal form of Chalcedony/Quartz, SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Emerald in Matrix (Quartz/Schist) (Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Basalt River Cobble (Basalt (Mafic Igneous Rock)) — igneous

Basalt River Cobble

Basalt (Mafic Igneous Rock)

Granatic Pegmatite (Pegmatitic Granite) — igneous

Granatic Pegmatite

Pegmatitic Granite

Granite (Granite) — igneous

Granite

Granite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Bumble Bee Jasper (Calcite-bearing Volcanic Tuff (not a true Jasper)) — sedimentary

Bumble Bee Jasper

Calcite-bearing Volcanic Tuff (not a true Jasper)

Apricot Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Apricot Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Honey Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Green Chalcedony (likely Green Agate or Chrysoprase) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — Mineral

Green Chalcedony (likely Green Agate or Chrysoprase)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

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

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Oolitic Chert (Oolitic Microcrystalline Quartz (SiO2)) — sedimentary

Oolitic Chert

Oolitic Microcrystalline Quartz (SiO2)

Turquoise (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Moqui Marbles (Iron Oxide Concretion (Hematite/Goethite)) — sedimentary

Moqui Marbles

Iron Oxide Concretion (Hematite/Goethite)

Goldstone (Avventurina (Cu + SiO2 glass)) — mineral

Goldstone

Avventurina (Cu + SiO2 glass)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Green Moss Agate (Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite) — mineral

Green Moss Agate

Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite

Basalt (Basalt (composition of plagioclase, pyroxene, and olivine)) — igneous

Basalt

Basalt (composition of plagioclase, pyroxene, and olivine)

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

Riverstone Jasper (Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Riverstone Jasper (Chalcedony)

Silicon Dioxide (SiO2)

Dyed Pink Quartzite (Jadeite Simulant) (Silicon Dioxide (SiO2) with organic dye) — metamorphic

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Coarse Sand Grain / Lithic Fragment (Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)) — sedimentary

Coarse Sand Grain / Lithic Fragment

Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)

Chert (or possibly Flint) (SiO2 (Silicon Dioxide)) — Sedimentary Rock

Chert (or possibly Flint)

SiO2 (Silicon Dioxide)

Sedimentary Rock

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Chalcedony (Common Opal variant or Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Moss Agate (Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides