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

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

Blue Apatite

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

Chert (Blue-Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Blue-Gray Chert)

Microcrystalline quartz (SiO2)

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

Chert (specifically Flint)

Microcrystalline Quartz (SiO2)

Garnet Schist (Garnetiferous Micaceous Schist) — metamorphic

Garnet Schist

Garnetiferous Micaceous Schist

Yellow Jasper / Chert (Jasper (Silica/Quartz) - SiO2) — sedimentary

Yellow Jasper / Chert

Jasper (Silica/Quartz) - SiO2

Chert (Quartz Variety) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Quartz Variety)

Microcrystalline Silica (SiO2)

Chert (and its variety Flint) (Silicon dioxide (SiO2) / Microcrystalline quartz) — sedimentary

Chert (and its variety Flint)

Silicon dioxide (SiO2) / Microcrystalline quartz

Fossil Coral (Phylum Cnidaria / Rugosa or Tabulata) — fossil

Fossil Coral

Phylum Cnidaria / Rugosa or Tabulata

Petrified Wood (Silicified wood (principally SiO2)) — sedimentary

Petrified Wood

Silicified wood (principally SiO2)

Petrified Wood (Silicified wood (Quartz/Chalcedony - SiO2)) — mineral

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Beaded Jewelry (Assorted Gemstones) (Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ) — Mineral, Jewelry

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Mineral, Jewelry

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (Jasper/Flint variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

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

Quartz (specifically Milky/White Quartz)

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Amber (Succinite (Resinous fossilized tree sap)) — Mineraloid

Amber

Succinite (Resinous fossilized tree sap)

Moss Agate (Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)

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

Rhodonite

(Mn,Fe,Mg,Ca)SiO3

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

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Red Chert (Jasper)

Silicon Dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Red Jasper (Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)) — Mineral (variety of Chalcedony/Quartz)

Red Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

Mineral (variety of Chalcedony/Quartz)

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

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Chert (Yellow/Tan) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow/Tan)

Microcrystalline Quartz (SiO2)

Chert (specifically Red Chert / Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert / Jasper)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Chert) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (specifically Flint or Common Chert)

Silicon dioxide (SiO2) - Microcrystalline quartz

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (Nodule) (Chert (composition: SiO2)) — sedimentary

Chert (Nodule)

Chert (composition: SiO2)

Amber (Succinite (approximate formula C10H16O)) — mineral

Amber

Succinite (approximate formula C10H16O)

Amber (Succinite (Fossilized Resin)) — mineral

Amber

Succinite (Fossilized Resin)

Malachite (Copper(II) carbonate hydroxide, Cu2CO3(OH)2) — mineral

Malachite

Copper(II) carbonate hydroxide, Cu2CO3(OH)2

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (specifically Tan Chert or Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Tan Chert or Flint)

Silicon Dioxide (SiO2)

Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Rhodonite (Manganese Silicate (MnSiO₃)) — mineral

Rhodonite

Manganese Silicate (MnSiO₃)

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

Chert (var. Jasper)

Microcrystalline Quartz (SiO2)

Sandstone (Cross-bedded Drill Core) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

Chert (Jasper/Chalcedony pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Chalcedony pebble)

Microcrystalline Quartz (SiO2)

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

Chert Nodule (Fossiliferous Chert)

Microcrystalline Quartz (SiO2)

Epidote with Quartz (Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote with Quartz

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))