Rock Identifier

Category

Sedimentary (Physico Chemical Precipitate)

Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.

Basalt (Basalt (containing Pyroxene, Plagioclase Feldspar, and Olivine)) — igneous

Basalt

Basalt (containing Pyroxene, Plagioclase Feldspar, and Olivine)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Howlite (Dyed Turquoise) (Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite (Dyed Turquoise)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Diabase (also known as Dolerite) (Diabase) — igneous

Diabase (also known as Dolerite)

Diabase

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Serpentine (Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)

Greenstone / Serpentinite (Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Greenstone / Serpentinite

Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)

Ruby (Pink to Red Corundum) (Al2O3 (Corundum with Chromium impurities)) — mineral

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Orange Quartzite (River Pebble) (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Orange Quartzite (River Pebble)

Quartzite (SiO2 with iron oxide inclusions)

Quartzite Pebbler (Quartzite (SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Iron-stained) (Metamorphosed Quartz-rich Rock (SiO2)) — metamorphic

Quartzite (Iron-stained)

Metamorphosed Quartz-rich Rock (SiO2)

Azurite (Azurite (Cu3(CO3)2(OH)2)) — mineral

Azurite

Azurite (Cu3(CO3)2(OH)2)

Quartz (Gravel fragment) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Gravel fragment)

Quartz (Silicon Dioxide, SiO2)

Red Garnet (Almandine-Pyrope series) (Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)) — mineral

Red Garnet (Almandine-Pyrope series)

Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Gold (Placer Gold Nuggets) (Native Gold (Au)) — mineral

Gold (Placer Gold Nuggets)

Native Gold (Au)

Green Quartzite (with possible Epidote/Chlorite inclusions) (Quartzite (primarily SiO2)) — metamorphic

Green Quartzite (with possible Epidote/Chlorite inclusions)

Quartzite (primarily SiO2)

Sandstone or Siltstone (Arenite (if sandstone)) — Sedimentary

Sandstone or Siltstone

Arenite (if sandstone)

Quartzite Pebble (River Rock) (Quartzite (SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Quartzite (SiO2)

Rhyolite (Porphyritic) (Rhyolite (Felsic Extrusive Igneous Rock)) — igneous

Rhyolite (Porphyritic)

Rhyolite (Felsic Extrusive Igneous Rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Blue Quartzite (Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)) — metamorphic

Blue Quartzite

Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)

Glass Nugget (Tumbled Glass) (Amorphous Silicon Dioxide (SiO2) with additives) — mineraloid (man-made)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

mineraloid (man-made)

Orbicular Granite (Orbicular Granitoid) — igneous

Orbicular Granite

Orbicular Granitoid

Quartzite (Quartzite (SiO2 silicon dioxide)) — metamorphic

Quartzite

Quartzite (SiO2 silicon dioxide)

Milky Quartz (Water-worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Massive Quartz (Milky or Gray) (Silicon Dioxide (SiO2)) — mineral

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Lapis Lazuli (Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)

Banded Agate (specifically Mexican Lace Agate variety appearance) (Silicon Dioxide (SiO2 / Chalcedony)) — mineral

Banded Agate (specifically Mexican Lace Agate variety appearance)

Silicon Dioxide (SiO2 / Chalcedony)

Lapis Lazuli (Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Eudialyte (Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)) — mineral

Eudialyte

Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)

Banded Agate (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Banded Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Quartzite (River Pebble) (Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Quartzite (with Iron Staining) (Quartzite (predominantly SiO2)) — metamorphic

Quartzite (with Iron Staining)

Quartzite (predominantly SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Green Slag Glass (Amorphous Silica Glass (Anthropogenic)) — Industrial byproduct (often mistaken for obsidian or mineral)

Green Slag Glass

Amorphous Silica Glass (Anthropogenic)

Industrial byproduct (often mistaken for obsidian or mineral)

Agate (specifically Carnelian or Honey Agate) (Silicon Dioxide (SiO2)) — Mineral

Agate (specifically Carnelian or Honey Agate)

Silicon Dioxide (SiO2)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)