Rock Identifier

Category

Organic Gemstone (Often Associated With Sedimentary Sequences)

Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.

Learn about Organic Gemstone (Often Associated With Sedimentary Sequences) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Turbidite

Black Shale

Ironstone

Oil Shale

Jet

Limestone

Sandstone

Pegmatite

Euxenite

Pyroxenite

Carnelian (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

Chert (River Pebble with Liesegang Rings) (Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (River Pebble with Liesegang Rings)

Microcrystalline Silicon Dioxide (SiO2)

Amber (and Cubic Zirconia) (Fossilized Tree Resin) — mineraloid

Amber (and Cubic Zirconia)

Fossilized Tree Resin

Amber (Succinite (organic gemstone, approx. C10H16O)) — fossil

Amber

Succinite (organic gemstone, approx. C10H16O)

Chert (Nodule) (Chert (composed of Microcrystalline Silica/SiO2)) — sedimentary

Chert (Nodule)

Chert (composed of Microcrystalline Silica/SiO2)

Amber and Citrine Quartz (Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)) — mineral

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Greenstone (Greywacke or Nephrite Jade variant) (Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)) — metamorphic

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

Chert (Chert Nodule with Cortex) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chert Nodule with Cortex)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled Carnelian (Silicon Dioxide (Variety of Chalcedony), SiO2) — gemstone

Tumbled Carnelian

Silicon Dioxide (Variety of Chalcedony), SiO2

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

Black Chert (Flint)

Silicon Dioxide (SiO2)

Red Sandstone (Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)) — sedimentary

Red Sandstone

Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Red Jasper (Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)) — sedimentary

Red Jasper

Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)

Glauconite (Glauconitic Sandstone) (Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]) — sedimentary

Glauconite (Glauconitic Sandstone)

Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Dearest Ring (Gemstones) (Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)) — mineral

Dearest Ring (Gemstones)

Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)

Carnelian Agate (Silicon Dioxide (SiO2)) — gemstone

Carnelian Agate

Silicon Dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Banding Agate / Jasper Heart (Silicon Dioxide (Chalcedony / Quartz), SiO2) — gemstone

Banding Agate / Jasper Heart

Silicon Dioxide (Chalcedony / Quartz), SiO2

Chert (Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline quartz (SiO2)

Carnelian (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Green Jasper / Moss Agate variety) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Green Jasper / Moss Agate variety)

Silicon Dioxide (SiO2)

Serpentine ((Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

(Mg,Fe)3Si2O5(OH)4

Polished Ocean Jasper (orbicular jasper) (Microcrystalline quartz (SiO₂) with chalcedony, feldspar, and iron-oxide inclusions) — mineral

Polished Ocean Jasper (orbicular jasper)

Microcrystalline quartz (SiO₂) with chalcedony, feldspar, and iron-oxide inclusions

Amber (Succinrite (Organic Gemstone)) — mineraloid

Amber

Succinrite (Organic Gemstone)

Mica Schist (Mica Schist (primarily Muscovite or Biotite-rich sequence)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite or Biotite-rich sequence)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

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

Weathered coal-bearing sedimentary rock (likely shale or mudstone with coal fragments) (Carbonaceous shale/mudstone; predominantly clay minerals, quartz, and organic carbon) — sedimentary

Weathered coal-bearing sedimentary rock (likely shale or mudstone with coal fragments)

Carbonaceous shale/mudstone; predominantly clay minerals, quartz, and organic carbon

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

Jasper

Silicon Dioxide (SiO2) with impurities

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Red Jasper

Jasper (Silicon Dioxide) - SiO2

Red jasper pebble (Microcrystalline quartz (SiO₂), colored chiefly by iron oxides) — sedimentary

Red jasper pebble

Microcrystalline quartz (SiO₂), colored chiefly by iron oxides

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Chert (Nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)