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

Goldfish Cracker (Culinary Mimic) (Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)) — Anthropogenic Sedimentary-style Organic Solid

Goldfish Cracker (Culinary Mimic)

Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)

Anthropogenic Sedimentary-style Organic Solid

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

Chert (Flint)

Chert (SiO2)

Obsidian / Chert (Arrowhead Artifact) (Obsidian (volcanic glass, SiO2 with impurities)) — igneous

Obsidian / Chert (Arrowhead Artifact)

Obsidian (volcanic glass, SiO2 with impurities)

Granite (Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Granite Pebble (Phaneritic Felsic Igneous Rock) — igneous

Granite Pebble

Phaneritic Felsic Igneous Rock

Agate (Geode nodule fragment) (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Agate (Geode nodule fragment)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

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

Chert (Flint)

Silicon Dioxide (SiO2)

Vesicular Basalt (Aqueous Tumbled) (Scoriaceous Basalt) — igneous

Vesicular Basalt (Aqueous Tumbled)

Scoriaceous Basalt

Granite (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite

Granite (Felsic Intrusive Igneous Rock)

Eclogite (retrograded) (Eclogite (Omphacite-Garnet rock)) — metamorphic

Eclogite (retrograded)

Eclogite (Omphacite-Garnet rock)

Granite (River Cobble) (Granite (rich in feldspar, quartz, and biotite)) — igneous

Granite (River Cobble)

Granite (rich in feldspar, quartz, and biotite)

Blue Topaz (Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2]) — gemstone

Blue Topaz

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2]

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Orange Tabby (Felis catus) (Felis silvestris catus (variety: Red Mackerel Tabby)) — Organic/Biological specimen (Non-Mineral)

Orange Tabby (Felis catus)

Felis silvestris catus (variety: Red Mackerel Tabby)

Organic/Biological specimen (Non-Mineral)

Quartz (Tumbled/Water-worn pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Tumbled/Water-worn pebble)

Silicon Dioxide (SiO2)

Quartz (Rose or Milky variety fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

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

Raw Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Labradorite ((Ca, Na)(Al, Si)4O8) — mineral

Labradorite

(Ca, Na)(Al, Si)4O8

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Quartz geode / iron-stained quartz vein rock (Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals) — mineral

Quartz geode / iron-stained quartz vein rock

Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals

Peacock Ore (Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)

Fossiliferous Limestone (Calcareous biomicrite / Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Calcareous biomicrite / Calcium Carbonate (CaCO3)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Chert (Flint) Artifact

Silicon Dioxide (SiO2)

Pink Dyed Agate (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Blue Lace Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Blue Lace Agate (Chalcedony (SiO2)) — mineral

Blue Lace Agate

Chalcedony (SiO2)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sandstone Pebble / Quartzite Pebble (SiO2 (Silicon Dioxide enriched sedimentary rock)) — sedimentary

Sandstone Pebble / Quartzite Pebble

SiO2 (Silicon Dioxide enriched sedimentary rock)

Quartz (Chert/Chalcedony flake) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony flake)

Silicon Dioxide (SiO2)

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

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

Chert (Flint) with Patina

Microcrystalline Quartz (SiO2)

Jasper (Petrified Wood Variety) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Petrified Wood Variety)

Silicon Dioxide (SiO2)

Blue Lace Agate (with Amethyst Geode center) (Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony) — mineral

Blue Lace Agate (with Amethyst Geode center)

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Prasiolite (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite

Silicon Dioxide (SiO2) with iron impurities

Dyed Agate Geode (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Banded Chalcedony

Dyed Agate (Tumbled) (Silicon Dioxide (SiO2) - stained microcrystalline quartz) — sedimentary

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - stained microcrystalline quartz

Chalcedony/Agate (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony/Agate

Cryptocrystalline Silica (SiO2)

Dyed Pink Agate Slice (Silicon Dioxide (SiO2) - Chalcedony variety Agate) — mineral

Dyed Pink Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety Agate