Rock Identifier

Category

Artifact

Browse artifact specimens identified by the Rock Identifier community.

Flint (SiO2 (Cryptocrystalline Quartz)) — sedimentary

Flint

SiO2 (Cryptocrystalline Quartz)

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

Chert (Flint)

Chert (SiO2)

Chert (Field Stone) (Chert (SiO2)) — sedimentary

Chert (Field Stone)

Chert (SiO2)

Greenstone / Greenschist (Chlorite schist / Meta-basalt) — metamorphic

Greenstone / Greenschist

Chlorite schist / Meta-basalt

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

Chert (Jasper/Common Chert)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

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

Chert / Microcrystalline Quartz

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Silicon Dioxide (SiO2)

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

Chert (Iron-stained)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Chert (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (flint) (Microcrystalline quartz (SiO₂), commonly called chert; flint is a dark variety) — sedimentary

Chert (flint)

Microcrystalline quartz (SiO₂), commonly called chert; flint is a dark variety

Chert (Arrowhead Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead Point)

Microcrystalline Quartz (SiO2)

Jadeite (Jadeite (NaAlSi2O6)) — mineral

Jadeite

Jadeite (NaAlSi2O6)

Onyx (Black Onyx) (Silicon Dioxide (SiO2) - Chalcedony variety) — Mineral

Onyx (Black Onyx)

Silicon Dioxide (SiO2) - Chalcedony variety

Red Jasper (SiO2, Chalcedony with iron inclusions) — mineral

Red Jasper

SiO2, Chalcedony with iron inclusions

Chert Arrowhead (Projectile Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Jadeite (NaAlSi2O6 (Sodium Aluminum Silicate)) — metamorphic

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Nephrite Jade (Calcium Magnesium Iron Silicate Hydroxide - Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Calcium Magnesium Iron Silicate Hydroxide - Ca2(Mg,Fe)5Si8O22(OH)2

Ironstone Concretion (Pot Stone) (Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Pot Stone)

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Chert (Brown Variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

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

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Sandstone Concretion (Siliciclastic Concretion) — sedimentary

Sandstone Concretion

Siliciclastic Concretion

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

Faceted citrine-colored gemstone (likely synthetic/display stone) (Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation) — gemstone

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

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

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Diorite (Intermediate intrusive igneous rock) — igneous

Diorite

Intermediate intrusive igneous rock

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)