Rock Identifier

Category

Organic Gemstone (Sedimentary Classification)

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

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

Carnelian

SiO2 (Silicon Dioxide), a variety of Chalcedony

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

Hematite

Iron(III) oxide (Fe2O3)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Red Jasper (Mahogany Obsidian variant similarity) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (Mahogany Obsidian variant similarity)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Jasper (Cryptocrystalline Quartz, SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper (Silicon dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon dioxide (SiO2)

Red Jasper (possibly Chert/Argillite) (Jasper (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (possibly Chert/Argillite)

Jasper (SiO2) with iron oxide inclusions

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

Amethyst

Amethyst (SiO2 - Silicon Dioxide with iron impurities)

Dalmatian Jasper (Dalmatian Stone) (Peralkaline rhyolite) — igneous

Dalmatian Jasper (Dalmatian Stone)

Peralkaline rhyolite

Nuummite (Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)) — metamorphic

Nuummite

Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)

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

Black Opal

Hydrated Silica (SiO2·nH2O)

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

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sparkling Druzy Quartz on Matrix (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Sparkling Druzy Quartz on Matrix

Silicon Dioxide (SiO2) with iron oxide inclusions

Mookaite Jasper (Radiolarite (Chert/Jasper variety), formula SiO2) — sedimentary

Mookaite Jasper

Radiolarite (Chert/Jasper variety), formula SiO2

Ferruginous Quartz (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Ferruginous Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Paper (Cellulose) (Cellulose (C6H10O5)n) — Organic (Anthropogenic)

Paper (Cellulose)

Cellulose (C6H10O5)n

Organic (Anthropogenic)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Jasper (likely Ocean Jasper or Variegated Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (likely Ocean Jasper or Variegated Jasper)

Silicon Dioxide (SiO2) with impurities

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

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Leopard Skin Jasper (Orbicular Rhyolite (Silicon Dioxide with various impurities)) — sedimentary

Leopard Skin Jasper

Orbicular Rhyolite (Silicon Dioxide with various impurities)

Jasper (with Manganese or Iron inclusions) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (with Manganese or Iron inclusions)

Silicon Dioxide (SiO2)

Red Jasper (Chert) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper (Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Banded Chalcedony (Agate) (Chalcedony (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Chalcedony (Agate)

Chalcedony (SiO2) - Cryptocrystalline Quartz

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]

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

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

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Garnet (Almandine variety) (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine variety)

Almandine Garnet (Fe3Al2(SiO4)3)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)

Chert (specifically Flint or Jasper-Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Jasper-Chert)

Silicon Dioxide (SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)