Rock Identifier

Category

Sedimentary (Processed Mineral Product)

Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Processed Mineral Product) in the encyclopedia

Coal

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Glauconite

Breccia

Hutcheonite

Halite

Ironstone

Sperrylite

Baddeleyite

Anatase

Brookite

Biotite Schist (Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]) — metamorphic

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

Red Jasper (beads) (SiO₂ (Silicon Dioxide)) — Mineral, variety of chalcedony (microcrystalline quartz)

Red Jasper (beads)

SiO₂ (Silicon Dioxide)

Mineral, variety of chalcedony (microcrystalline quartz)

Paving-concrete aggregate with a rounded stone (Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock) — sedimentary

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Tumbled black-and-white stone, likely dendritic agate or jasper (Cryptocrystalline quartz (SiO₂), possibly chalcedony with manganese-oxide dendrites) — mineral

Tumbled black-and-white stone, likely dendritic agate or jasper

Cryptocrystalline quartz (SiO₂), possibly chalcedony with manganese-oxide dendrites

Lapis lazuli bead bracelet (Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂) — metamorphic

Lapis lazuli bead bracelet

Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂

Dyed turquoise-colored lava stone beads (Vesicular basalt (scoria), commonly sold as dyed lava rock) — igneous

Dyed turquoise-colored lava stone beads

Vesicular basalt (scoria), commonly sold as dyed lava rock

Gold-bearing quartz or ironstone fragment (Quartz (SiO₂) with possible native gold and iron oxides) — mineral

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

Wollastonite (Calcium Inosilicate, CaSiO3) — mineral

Wollastonite

Calcium Inosilicate, CaSiO3

Amethyst (Tumbled/Water-worn) (Silicon Dioxide (SiO2)) — mineral

Amethyst (Tumbled/Water-worn)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2-rich metamorphic rock)) — metamorphic

Quartzite

Quartzite (SiO2-rich metamorphic rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Green sea glass (likely slag glass or bottle glass) (Man-made soda-lime silicate glass; not a naturally occurring mineral) — mineral

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Iron-stained chert or siliceous sedimentary rock (Microcrystalline quartz (SiO₂), likely chert with iron-oxide staining) — sedimentary

Iron-stained chert or siliceous sedimentary rock

Microcrystalline quartz (SiO₂), likely chert with iron-oxide staining

Tumbled pale green aventurine or chalcedony (Quartz-group silica, primarily microcrystalline SiO₂; possible fuchsite-bearing aventurine) — mineral

Tumbled pale green aventurine or chalcedony

Quartz-group silica, primarily microcrystalline SiO₂; possible fuchsite-bearing aventurine

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Honey calcite (Calcite (calcium carbonate, CaCO₃)) — mineral

Honey calcite

Calcite (calcium carbonate, CaCO₃)

Granite (Granite (interlocking crystals of quartz, feldspar, and mica)) — igneous

Granite

Granite (interlocking crystals of quartz, feldspar, and mica)

Common Gravel / Pebble (Lithified rock fragment / Detrital sediment) — sedimentary

Common Gravel / Pebble

Lithified rock fragment / Detrital sediment

Pyrite specimen (Pyrite, FeS₂ (iron disulfide)) — mineral

Pyrite specimen

Pyrite, FeS₂ (iron disulfide)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Green tourmaline (likely chrome/dravite tourmaline crystals) (Tourmaline-group cyclosilicate; commonly elbaite, dravite, or chromdravite, complex borosilicate formula) — mineral

Green tourmaline (likely chrome/dravite tourmaline crystals)

Tourmaline-group cyclosilicate; commonly elbaite, dravite, or chromdravite, complex borosilicate formula

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Slag Glass (SiO2 (Silicon Dioxide) with impurities) — man-made glass

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Milky quartz with iron staining (Quartz (silicon dioxide, SiO₂), likely massive or vein quartz) — mineral

Milky quartz with iron staining

Quartz (silicon dioxide, SiO₂), likely massive or vein quartz

Kyanite (within Quartz) (Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)) — metamorphic

Kyanite (within Quartz)

Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)

Black tumbled stone, likely obsidian (Volcanic glass; chiefly amorphous SiO₂) — igneous

Black tumbled stone, likely obsidian

Volcanic glass; chiefly amorphous SiO₂

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Black tourmaline (schorl) on quartz matrix (Schorl, NaFe3Al6(BO3)3Si6O18(OH)4, commonly associated with quartz (SiO2)) — mineral

Black tourmaline (schorl) on quartz matrix

Schorl, NaFe3Al6(BO3)3Si6O18(OH)4, commonly associated with quartz (SiO2)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety

Likely iron-rich slag or weathered ironstone (Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag) — mineral

Likely iron-rich slag or weathered ironstone

Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag

Magnetic Hematite (Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)) — Mineral

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Green Jadeite (NaAlSi2O6 (Sodium Aluminum Silicate)) — metamorphic

Green Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

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

Quartz pebble

Quartz (Silicon Dioxide, SiO2)

Epidote (Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Native copper (Copper (Cu), often with malachite, cuprite, or matrix minerals) — mineral

Native copper

Copper (Cu), often with malachite, cuprite, or matrix minerals

Turquoise color-bead and Hematite necklace (Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)) — mineral

Turquoise color-bead and Hematite necklace

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Polished garnet beads (Garnet group, commonly almandine–pyrope solid solution (approximately Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃)) — gemstone

Polished garnet beads

Garnet group, commonly almandine–pyrope solid solution (approximately Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃)

Marble (Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)) — Metamorphic Rock

Marble

Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)

Metamorphic Rock