Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

White Beryl

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

River Rock (likely Gneiss or Quartzite) (Metamorphic rock specimen (potentially Foliated Gneiss)) — metamorphic

River Rock (likely Gneiss or Quartzite)

Metamorphic rock specimen (potentially Foliated Gneiss)

Quartz Geode with Calcite/Siderite (Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions) — mineral

Quartz Geode with Calcite/Siderite

Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions

Heat-Treated Citrine (Quartz (Silicon Dioxide, SiO2)) — mineral

Heat-Treated Citrine

Quartz (Silicon Dioxide, SiO2)

Pegmatitic Granite (Granite (Alkali-feldspar granite) with Quartz and Orthoclase) — igneous

Pegmatitic Granite

Granite (Alkali-feldspar granite) with Quartz and Orthoclase

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Orange Calcite (Iron-Stained) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Iron-Stained)

Calcium Carbonate (CaCO3)

Chert (Smooth River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper variety)

Cryptocrystalline Quartz (SiO2)

Quartz (Pale Rose or Milky Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Pale Rose or Milky Variety)

Silicon Dioxide (SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Chert (Chert breccia)

SiO2 (Silicon Dioxide)

Quartz pebble with host matrix (Silicon Dioxide (SiO2)) — mineral

Quartz pebble with host matrix

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (River Stone) (Basalt (SiO2 range 45-52%)) — igneous

Basalt (River Stone)

Basalt (SiO2 range 45-52%)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — Mineral / Metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Mineral / Metamorphic

Chert (specifically Jasper/Carnelian variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Jasper/Carnelian variety)

Microcrystalline quartz (SiO2)

Basalt with Quartz/Calcite Inclusion (Aphanitic Mafic Igneous Rock (Basalt) with SiO2 or CaCO3 vein) — igneous

Basalt with Quartz/Calcite Inclusion

Aphanitic Mafic Igneous Rock (Basalt) with SiO2 or CaCO3 vein

Sandstone (Quartzose) (Arenite (SiO2 based)) — sedimentary

Sandstone (Quartzose)

Arenite (SiO2 based)

Calcite on Limestone (Calcium Carbonate (CaCO3)) — mineral

Calcite on Limestone

Calcium Carbonate (CaCO3)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Emerald with Matrix (Emerald in Mica Schist) (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

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

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) Bead (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal) Bead

Silicon Dioxide (SiO2)

Biotite (Black Mica) (Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)) — mineral

Biotite (Black Mica)

Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)

Likely weathered sandstone or iron-stained quartzite fragment (Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)) — sedimentary

Likely weathered sandstone or iron-stained quartzite fragment

Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)

Siltstone Pebble (Siltstone) — sedimentary

Siltstone Pebble

Siltstone

Granite River Pebble (Granite (Phaneritic igneous rock)) — igneous

Granite River Pebble

Granite (Phaneritic igneous rock)

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

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Chert (Chalcedony/Agate Pebble) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Chalcedony/Agate Pebble)

Cryptocrystalline Silica (SiO2)

Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

Granite (Granite) — Igneous

Granite

Granite

Jasper (Silicon dioxide (SiO2)) — Sedimentary / Mineral

Jasper

Silicon dioxide (SiO2)

Sedimentary / Mineral

N/A - Image does not contain a rock or mineral (Anthropogenic textile material) — Non-geological

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

Chalcedony with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variant)

Microcrystalline Quartz (SiO2)

Quartzite Beach Pebble (with Quartz Vein) (SiO2 (Quartzite)) — metamorphic

Quartzite Beach Pebble (with Quartz Vein)

SiO2 (Quartzite)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chert (Common Opal/Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Chalcedony)

Microcrystalline Quartz (SiO2)