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

Mixed Mineral Collection (with Quartz, Beryl, and host rock) (Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite) — mineral

Mixed Mineral Collection (with Quartz, Beryl, and host rock)

Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Sandstone (Sandstone (principally SiO2/Silicon Dioxide)) — sedimentary

Sandstone

Sandstone (principally SiO2/Silicon Dioxide)

Pearl necklace (Pearl (biogenic calcium carbonate, chiefly aragonite; CaCO₃)) — gemstone

Pearl necklace

Pearl (biogenic calcium carbonate, chiefly aragonite; CaCO₃)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Yellow Chert (River Stone) (Chert (SiO2)) — sedimentary

Yellow Chert (River Stone)

Chert (SiO2)

Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Tiger Iron (Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)) — metamorphic

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)

Jasper-Agate (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper-Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Citrine (SiO2 (Silicon Dioxide)) — Mineral

Citrine

SiO2 (Silicon Dioxide)

Chert (specifically Black Chert or Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically Black Chert or Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Quartz (SiO₂ (Silicon Dioxide)) — Mineral

Quartz

SiO₂ (Silicon Dioxide)

Hawk's Eye (Blue Tiger's Eye) (Quartz (fibrous crocidolite variety)) — Mineral

Hawk's Eye (Blue Tiger's Eye)

Quartz (fibrous crocidolite variety)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Kidney Stone (Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)) — mineral

Kidney Stone

Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Banded Chert

Chert (Microcrystalline Quartz, SiO2)

Chert (often referred to as Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Iron-stained) (Chert / Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Chert (Tan/Grey) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Tan/Grey)

Chert (Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Chert (Flinty variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flinty variety)

Microcrystalline Quartz (SiO2)

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

Chert / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

Shale or Siltstone (Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)) — sedimentary

Shale or Siltstone

Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)

Quartz (Chert/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Red Jasper Concretion (Cryptocrystalline Quartz (SiO2)) — sedimentary

Red Jasper Concretion

Cryptocrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Green Chert (Jasper) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Green Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Red Jasper with Quartz Vein (Microcrystalline Quartz (SiO2) with Hematite inclusions) — sedimentary

Red Jasper with Quartz Vein

Microcrystalline Quartz (SiO2) with Hematite inclusions

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

Chert (Jasper influence)

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

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]

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Fossiliferous Sandstone / Fossil Fragment (Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material) — fossil

Fossiliferous Sandstone / Fossil Fragment

Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)