Rock Identifier

Category

Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Browse organic gemstone (not a rock or mineral in the traditional sense, but bio mineralized material) specimens identified by the Rock Identifier community.

Blue Apatite (Apatite (Group), Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Chert / Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Jasper

Microcrystalline Quartz (SiO2)

Tufa (Limestone) (Calcareous Tufa (CaCO3)) — sedimentary

Tufa (Limestone)

Calcareous Tufa (CaCO3)

Turquoise in Matrix (Hydrous phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise in Matrix

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

Moss Agate (Chalcedony (Silicon Dioxide, SiO2) with inclusions of Chlorite, Manganese, or Iron) — mineral

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions of Chlorite, Manganese, or Iron

Sandstone (Red Sandstone) (Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)) — sedimentary

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Crushed Stone (Gravel/Aggregates) (Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)) — sedimentary and igneous (mixed)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

sedimentary and igneous (mixed)

Amber (Succinicum (Organic Gemstone - Resinite)) — mineraloid

Amber

Succinicum (Organic Gemstone - Resinite)

Sandstone (Arenite (SiO2 based with various mineral cements)) — sedimentary

Sandstone

Arenite (SiO2 based with various mineral cements)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Petrified Wood (Silicified Wood) (Silicified fossil wood (SiO2)) — metamorphic

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

Red Sandstone (Arenite (Fe2O3 rich)) — sedimentary

Red Sandstone

Arenite (Fe2O3 rich)

Sandstone (Quartzite-rich) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Lapis Lazuli (Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])) — Metamorphic Rock (primarily composed of minerals)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Metamorphic Rock (primarily composed of minerals)

Diamond (Rough) (Diamond (C)) — Mineral

Diamond (Rough)

Diamond (C)

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Sandstone (likely Quartzose) (Sandstone (Principally SiO2)) — sedimentary

Sandstone (likely Quartzose)

Sandstone (Principally SiO2)

Bauxite (Bauxite (Al(OH)3, AlO(OH))) — sedimentary

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Mica Schist (Mica Schist (primarily Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Sandstone (Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)) — sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Arenite (SiO2 based with quartz grains)) — sedimentary

Sandstone

Arenite (SiO2 based with quartz grains)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Lapis Lazuli (Low Grade) (Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)) — metamorphic

Lapis Lazuli (Low Grade)

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

Quartz (likely Milky Quartz or Chalcedony) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Slate (Slate (foliated metamorphic rock)) — metamorphic

Slate

Slate (foliated metamorphic rock)

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

Chert (Chert / Flint)

Silicon Dioxide (SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Arenite (often composed of Quartz, SiO2)) — sedimentary

Sandstone

Arenite (often composed of Quartz, SiO2)

Amazonite (K(AlSi3O8) - Microcline variant) — mineral

Amazonite

K(AlSi3O8) - Microcline variant

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Chert (and its variety Flint) (Silicon Dioxide (SiO2) - Microcrystalline or cryptocrystalline Quartz) — sedimentary

Chert (and its variety Flint)

Silicon Dioxide (SiO2) - Microcrystalline or cryptocrystalline Quartz

Zircon (Zirconium Silicate (ZrSiO₄)) — mineral

Zircon

Zirconium Silicate (ZrSiO₄)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)