Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Learn about Mineralological 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

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Elbaite

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Chert (potentially Jasper or Agatized Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (potentially Jasper or Agatized Chert)

Microcrystalline Quartz (SiO2)

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

Red Obsidian

Volcanic Glass (Amorphous SiO2)

Smoky Quartz with Hematite Inclusions (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Smoky Quartz with Hematite Inclusions

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

Basalt (with possible Serpentinization) (Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Basalt (with possible Serpentinization)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Quartz Geode (Silicon dioxide (SiO2)) — mineral

Quartz Geode

Silicon dioxide (SiO2)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

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

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Druzy Quartz on Agate/Chert (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz on Agate/Chert

Silicon Dioxide (SiO2)

Kidney Stone (Medical Specimen) (Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O) — Mineral (Biogenic)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Mineral (Biogenic)

Unidentified weathered mineral/rock fragment (Indeterminate; likely a weathered iron-rich silicate or sulfide-bearing specimen) — mineral

Unidentified weathered mineral/rock fragment

Indeterminate; likely a weathered iron-rich silicate or sulfide-bearing specimen

Quartz (Clear Quartz Point) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz Point)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Basalt with Olivine Phenocrysts (Aphanitic Mafic Volcanic Rock (Basalt)) — igneous

Basalt with Olivine Phenocrysts

Aphanitic Mafic Volcanic Rock (Basalt)

Porphyritic Basalt (with Amygdales) (Amygdaloidal Porphyritic Basalt) — igneous

Porphyritic Basalt (with Amygdales)

Amygdaloidal Porphyritic Basalt

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Chert with Epidote and Jasper inclusions (SiO2 (Silicon Dioxide) with Ca2(Al, Fe)3(SiO4)3(OH) inclusions) — sedimentary

Chert with Epidote and Jasper inclusions

SiO2 (Silicon Dioxide) with Ca2(Al, Fe)3(SiO4)3(OH) inclusions

Quartz / Calcite Vein Rock (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)) — mineral

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Pyrite-bearing quartz vein rock (Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products) — mineral

Pyrite-bearing quartz vein rock

Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Brown Quartz (Jasper or Chert) (Silicon Dioxide (SiO2)) — sedimentary

Brown Quartz (Jasper or Chert)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Chert with Desert Varnish (Cryptocrystalline Quartz (SiO2) with Manganese/Iron oxide coating) — sedimentary

Chert with Desert Varnish

Cryptocrystalline Quartz (SiO2) with Manganese/Iron oxide coating

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

Chert / Green Jasper

Silicon Dioxide (SiO2)

Jasper with Chalcedony (Silicon Dioxide (SiO2)) — mineral

Jasper with Chalcedony

Silicon Dioxide (SiO2)

Yellow Quartzite (River Pebble) (Quartzite (SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (SiO2)

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

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Amethyst (Silicon dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon dioxide (SiO2) with iron impurities

Siltstone Pebble (Siltstone (fine-grained siliciclastic sedimentary rock)) — sedimentary

Siltstone Pebble

Siltstone (fine-grained siliciclastic sedimentary rock)

Cullet Glass (Slag) (Amorphous Silicon Dioxide (Man-made)) — Mineraloid

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Carnelian Agate (Silicon Dioxide (SiO2) - Variety: Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Variety: Chalcedony

Quartz with Spessartine Garnet and Iron Staining (Silicon Dioxide (SiO2) with Almandine-Spessartine (Mn3Al2(SiO4)3)) — mineral

Quartz with Spessartine Garnet and Iron Staining

Silicon Dioxide (SiO2) with Almandine-Spessartine (Mn3Al2(SiO4)3)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2) with Hematite/Limonite) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite/Limonite

Unidentified gray rock/mineral specimen (Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen) — mineral

Unidentified gray rock/mineral specimen

Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen

Chert (Sea-worn Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Sea-worn Pebble)

Microcrystalline Quartz (SiO2)

Chalcedony (Agate/Jasper mix) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate/Jasper mix)

Cryptocrystalline Quartz (SiO2)

Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

Green Fluorite (Botryoidal/Massive) (Calcium Fluoride (CaF2)) — mineral

Green Fluorite (Botryoidal/Massive)

Calcium Fluoride (CaF2)

Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)