Rock Identifier

Category

Sedimentary (Physico Chemical Precipitate)

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

Gold Flake (Native Gold (Au)) — mineral

Gold Flake

Native Gold (Au)

Chrysocolla (Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O) — Mineral

Chrysocolla

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Obsidian (specifically Mahogany Obsidian) (Volcanic glass (high silica content, SiO2)) — igneous

Obsidian (specifically Mahogany Obsidian)

Volcanic glass (high silica content, SiO2)

Unakite (Unakitized granodiorite / Quartz-Epidote-Feldspar rock) — metamorphic

Unakite

Unakitized granodiorite / Quartz-Epidote-Feldspar rock

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

Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Green Aura Quartz (Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)) — mineral

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Cavansite (Cavansite (Ca(VO)Si4O10·4H2O)) — mineral

Cavansite

Cavansite (Ca(VO)Si4O10·4H2O)

Quartzite (Iron-stained) (Quartzite (SiO2 with iron oxides)) — metamorphic

Quartzite (Iron-stained)

Quartzite (SiO2 with iron oxides)

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

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

Dyed Agate Geode (Pink/Magenta) (Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz) — mineral

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

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

Yellow Quartzite Pebble

Quartzite (primarily SiO2)

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

Howlite (Dyed to resemble Turquoise)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Soapstone (Steatite) carving (Steatite (primarily Talc, Mg3Si4O10(OH)2)) — metamorphic

Soapstone (Steatite) carving

Steatite (primarily Talc, Mg3Si4O10(OH)2)

Astrophyllite (Astrophyllite (K2NaFe7Ti2Si8O26(OH)4F)) — mineral

Astrophyllite

Astrophyllite (K2NaFe7Ti2Si8O26(OH)4F)

Quartzite (or Milky Quartz pebble) (Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)) — metamorphic

Quartzite (or Milky Quartz pebble)

Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Lapis Lazuli (Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)) — metamorphic

Lapis Lazuli

Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

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

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Fluorite (likely) (Calcium Fluoride (CaF2)) — Mineral

Fluorite (likely)

Calcium Fluoride (CaF2)

Apatite (Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))) — mineral

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Amber (Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.) — Mineral

Amber

Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.

Quartzite (Quartzite (Primary mineral: Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Quartz (specifically a water-worn river pebble) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically a water-worn river pebble)

Silicon Dioxide (SiO2)

Gold Ore (Native Gold (Au) in Matrix) — mineral

Gold Ore

Native Gold (Au) in Matrix

Chevron Amethyst (Silicon Dioxide (SiO2) with trace Iron (Fe3+)) — mineral

Chevron Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe3+)

Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Diabase (also known as Dolerite)

Diabase

Granite River Pebble (Phaneritic Granite (primarily Quartz, Feldspar, and Mica)) — igneous

Granite River Pebble

Phaneritic Granite (primarily Quartz, Feldspar, and Mica)

Epidote (or Epidote-rich rock) (Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).) — Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks

Green Onyx (Banded Calcite) (Banded Calcite / Aragonite (CaCO3)) — mineral

Green Onyx (Banded Calcite)

Banded Calcite / Aragonite (CaCO3)

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

Quartz (Specifically Clear to Smoky Quartz point) (Silicon Dioxide (SiO2)) — mineral

Quartz (Specifically Clear to Smoky Quartz point)

Silicon Dioxide (SiO2)