Rock Identifier

Category

Artifact

Browse artifact specimens identified by the Rock Identifier community.

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

Chert (Flint)

Chert (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

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

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Diorite (Diorite) — igneous

Diorite

Diorite

Heliotrope (Bloodstone) (Chalcedony quartz variety (SiO2) with hematite or jasper inclusions) — mineral

Heliotrope (Bloodstone)

Chalcedony quartz variety (SiO2) with hematite or jasper inclusions

Sandstone Concretion (Clastic Sedimentary Concretion (SiO2 with Iron Oxide)) — sedimentary

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Heliotrope (Bloodstone) (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Heliotrope (Bloodstone)

Silicon Dioxide (SiO2) with Hematite inclusions

Concretion with Geode Cavity (Ferruginous Sandstone Concretion with Quartz Center) — sedimentary

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Dzi Bead (Agate Bead) (Cryptocrystalline Quartz (SiO2) - Chalcedony/Agate) — mineral

Dzi Bead (Agate Bead)

Cryptocrystalline Quartz (SiO2) - Chalcedony/Agate

Amber (Fossilized tree resin (C10H16O)) — gemstone

Amber

Fossilized tree resin (C10H16O)

Jade (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)) — gemstone

Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Carnelian (Tumbled) (Carnelian (SiO2 with Iron Oxide impurities)) — mineral

Carnelian (Tumbled)

Carnelian (SiO2 with Iron Oxide impurities)

Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Ferruginous Sandstone (Sandstone (SiO2 with Fe2O3 cement)) — sedimentary

Ferruginous Sandstone

Sandstone (SiO2 with Fe2O3 cement)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Turquoise (possible Howlite imitation) (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise (possible Howlite imitation)

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Yellow Jade (Jadeite or Nephrite (various silicates)) — metamorphic

Yellow Jade

Jadeite or Nephrite (various silicates)

Megalodon Shark Tooth (Partial Fossil) (Otodus megalodon (fossilized in Calcium Phosphate/Apatite)) — Mineral/Fossil

Megalodon Shark Tooth (Partial Fossil)

Otodus megalodon (fossilized in Calcium Phosphate/Apatite)

Obsidian (black volcanic glass) (Obsidian; predominantly silica-rich volcanic glass, commonly rhyolitic (approximately 70–75% SiO₂)) — igneous

Obsidian (black volcanic glass)

Obsidian; predominantly silica-rich volcanic glass, commonly rhyolitic (approximately 70–75% SiO₂)

Sandstone concretion (Arenite sedimentary rock (concretion/nodule)) — sedimentary

Sandstone concretion

Arenite sedimentary rock (concretion/nodule)

Chert (Microcrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline quartz (SiO2)

Concretion (Sedimentary Concretion (Ironstone / Calcite Concretion)) — sedimentary

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Sandstone Concretion (Sedimentary Clastic Rock (Silicate-rich)) — sedimentary

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Diorite (Intrusive Igneous Rock (Intermediate Composition)) — igneous

Diorite

Intrusive Igneous Rock (Intermediate Composition)

Sandstone Concretion (Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)) — sedimentary

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)

Lapis Lazuli (Lapis Lazuli (Complex silicate mixture)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex silicate mixture)

Porphyry (Porphyritic Rhyolite/Andesite) — igneous

Porphyry

Porphyritic Rhyolite/Andesite

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Chert (White Variety)

Microcrystalline Silica (SiO2)

Chert (varieties including Flint or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (varieties including Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (variations like Flint or Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations like Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Flint (Chert (Silicon dioxide, SiO2)) — sedimentary

Flint

Chert (Silicon dioxide, SiO2)

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

Chert (Flint variety)

Silicon Dioxide (SiO2)

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

Chert (often called Flint)

Silicon Dioxide (SiO2)