Rock Identifier

Category

Mineral (Gemstone)

Browse mineral (gemstone) specimens identified by the Rock Identifier community.

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Dalmatian Jasper (Dalmatian Stone) (Peralkaline rhyolite) — igneous

Dalmatian Jasper (Dalmatian Stone)

Peralkaline rhyolite

Nuummite (Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)) — metamorphic

Nuummite

Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

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

Yellow Jasper

Silicon Dioxide (SiO2) with goethite/iron oxide inclusions

Vesicular Basalt with Opal or Quartz (Vesicular Basalt (Amorphous SiO2.nH2O if Opal)) — igneous

Vesicular Basalt with Opal or Quartz

Vesicular Basalt (Amorphous SiO2.nH2O if Opal)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Tektite (Indochinite) (Tektite (Amorphous Silica Glass)) — igneous

Tektite (Indochinite)

Tektite (Amorphous Silica Glass)

Tree Agate (Silicon Dioxide (SiO2) with Chlorite inclusions) — sedimentary

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Unakite (Epidotized Granite) (Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Unakite (Epidotized Granite)

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

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

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Dolomite (Dolomite (CaMg(CO3)2)) — Mineral

Dolomite

Dolomite (CaMg(CO3)2)

Diamond (Diamond (C)) — Mineral

Diamond

Diamond (C)

Jasper (specifically Chert/Ironstone) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — sedimentary

Jasper (specifically Chert/Ironstone)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Chert (Green variety) (Microcrystalline Opaline/Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline Opaline/Quartz (SiO2)

Quartz (Crystal/Druzy Quartz) (Quartz (SiO₂)) — Mineral

Quartz (Crystal/Druzy Quartz)

Quartz (SiO₂)

Granite (Granite (a common type of Felsic Intrusive Igneous Rock)) — Igneous Rock

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Diamond (Diamond (C)) — Mineral

Diamond

Diamond (C)

Eclogite (Eclogite (Omphacite-Garnet Rock)) — metamorphic

Eclogite

Eclogite (Omphacite-Garnet Rock)

Chert (Nodular) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Nodular)

Microcrystalline Silica (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Mookaite Jasper (Silicified Porcellanite (SiO2 with impurities)) — sedimentary

Mookaite Jasper

Silicified Porcellanite (SiO2 with impurities)

Obsidian (Amorphous Volcanic Glass (primarily SiO2)) — igneous

Obsidian

Amorphous Volcanic Glass (primarily SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Black Opal (Hydrated silica (SiO2·nH2O)) — mineraloid

Black Opal

Hydrated silica (SiO2·nH2O)

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

Chert (often called Flint)

Chert (Silicon Dioxide, SiO2)

Jasper (Imperial Jasper style) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Imperial Jasper style)

Silicon Dioxide (SiO2) with impurities

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

Chert / Jasper

Silicon Dioxide (SiO2)

Tiger's Eye (likely Hawk's Eye variant) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye (likely Hawk's Eye variant)

Pseudomorph of Quartz after Crocidolite (SiO2)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Amber (Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O) — mineraloid

Amber

Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

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

Red Jasper (Chert)

Silicon Dioxide (SiO2)