Rock Identifier

Category

Organic Gemstone (Sedimentary Classification)

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

Learn about Organic Gemstone (Sedimentary Classification) in the encyclopedia

Sapropel

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Black Shale

Red Garnet

Red Garnet

Conglomerate

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Breccia

Ironstone

Ironstone

Oil Shale

Oil Shale

Jet

Jet

Petrified Wood

Petrified Wood

Amber

Amber

Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

Chert (varieties: Flint, Jasper) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (varieties: Flint, Jasper)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (often called Flint) (Chert (SiO2)) — sedimentary

Chert (often called Flint)

Chert (SiO2)

Chert (Nodule) (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (Nodule)

Chert (Cryptocrystalline Silica, SiO2)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert with Quartz Vein (Silicon dioxide (SiO2)) — sedimentary

Chert with Quartz Vein

Silicon dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Fairy Stone (Menilite Concretion) (Carbonate-rich concretion (often Siderite or Calcite in Clay)) — sedimentary

Fairy Stone (Menilite Concretion)

Carbonate-rich concretion (often Siderite or Calcite in Clay)

Glauconitic Sandstone (Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Nodule/Common Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Nodule/Common Chert)

Microcrystalline quartz (SiO2)

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

Chert (Flint Pebbles)

Microcrystalline Quartz (SiO2)

Chert (with nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Brown Variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline quartz (SiO2)

Chert / Microcrystalline Quartz (Silicon Dioxide (SiO2)) — sedimentary

Chert / Microcrystalline Quartz

Silicon Dioxide (SiO2)

Dragon Blood Jasper (Epidote with Red Piedmontite (Chalcedony/Quartz variant)) — sedimentary

Dragon Blood Jasper

Epidote with Red Piedmontite (Chalcedony/Quartz variant)

Chert (with Limestone/Marble traces) (Silicon Dioxide (SiO2) / Microcrystalline Quartz) — sedimentary

Chert (with Limestone/Marble traces)

Silicon Dioxide (SiO2) / Microcrystalline Quartz

Chert Nodule (with Geode cavity) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (with Geode cavity)

Cryptocrystalline Quartz (SiO2)

Shungite (Shungite (Non-crystalline carbon, C)) — mineral

Shungite

Shungite (Non-crystalline carbon, C)

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

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Chert (White Chert / Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

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

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert / Chalcedony

Silicon Dioxide (SiO2)

Chert (Arrowhead Debitage or Spall) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (Arrowhead Debitage or Spall)

Silicon Dioxide (SiO₂)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (specifically White Chert or Flint) (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or cryptocrystalline quartz (SiO2)

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

Jasper

Silicon dioxide (SiO2) with impurities

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

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint or Dark Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (and Flint) (Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz) — sedimentary

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz

Red Jasper (Quartz (Silicon Dioxide) with Hematite inclusions, SiO2) — mineral

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Yellow Jasper variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Yellow Jasper/Agatized Chert)

Microcrystalline Quartz (SiO2)