Rock Identifier

Category

Organic Gemstone (Sedimentary Classification)

Browse organic gemstone (sedimentary classification) specimens identified by the Rock Identifier community.

Jasper (Silicon dioxide / Chalcedony (SiO2)) — Sedimentary

Jasper

Silicon dioxide / Chalcedony (SiO2)

Sedimentary
Jasper (Imperial Jasper style) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Imperial Jasper style)

Silicon Dioxide (SiO2) with impurities

sedimentary
Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary
Jasper (Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

sedimentary
Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Kyanite in Quartz (Kyanite (Al2SiO5) with Quartz (SiO2) matrix) — metamorphic

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

metamorphic
Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image) (SiO₂ (silicon dioxide)) — Sedimentary

Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)

SiO₂ (silicon dioxide)

Sedimentary
Blue Apatite (Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral
Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

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

Hematite

Iron(III) oxide (Fe2O3)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

mineral
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)

mineral
Picture Jasper (Silicon Dioxide (SiO2)) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2)

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

Turquoise

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

mineral
Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)

sedimentary
Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary
Green Jasper (Silicon Dioxide (SiO2) with iron silicate inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

sedimentary
Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

sedimentary
Green Jasper (Chert) (Silicon Dioxide (SiO2)) — sedimentary

Green Jasper (Chert)

Silicon Dioxide (SiO2)

sedimentary
Red Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary
Carnelian (Chalcedony) (Silicon Dioxide (SiO2) with trace Iron Oxide) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2) with trace Iron Oxide

mineral
Quartz (Milky or Clear Quartz fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

mineral
Amethyst Geode (Amethyst (Silicon Dioxide), Formula: SiO2) — mineral

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

mineral
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]

mineral
Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

mineral
Carnelian (Carnelian (a variety of Chalcedony, SiO2)) — mineral

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

mineral
Carnelian (Carnelian (Varietal of Chalcedony, SiO2 with Iron Oxide impurities)) — mineral

Carnelian

Carnelian (Varietal of Chalcedony, SiO2 with Iron Oxide impurities)

mineral
Jasper River Pebble (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Jasper River Pebble

Silicon Dioxide (SiO2) with iron oxide impurities

sedimentary
Chert (Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

sedimentary
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]

mineral
Celestite (Celestine) (Strontium sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium sulfate (SrSO4)

mineral
Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral
Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal

Hydrated Silica (SiO2·nH2O)

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

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

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

mineral
Magnetite (likely with weathered Limonite/Hematite) (Magnetite (Fe3O4) with iron oxide weathering) — mineral

Magnetite (likely with weathered Limonite/Hematite)

Magnetite (Fe3O4) with iron oxide weathering

mineral
Pietersite (Brecciated Crocidolite in Quartz (Chalcedony)) — metamorphic

Pietersite

Brecciated Crocidolite in Quartz (Chalcedony)

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

Red Jasper (possibly Carnelian)

Silicon Dioxide (SiO2) with Hematite impurities

mineral
Green Aventurine (Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral