Rock Identifier

Category

Non Geological

Browse non geological specimens identified by the Rock Identifier community.

Learn about Non Geological in the encyclopedia

Common Opal

Mudstone

Green Beryl

Matte Obsidian

Sapphire

Hornfels

Argillite

Mint Opal

Plazolite

Bixbite

Shungite (Non-crystalline carbon (C)) — mineral

Shungite

Non-crystalline carbon (C)

Shungite (Non-crystalline carbon (Fullerenes)) — metamorphic

Shungite

Non-crystalline carbon (Fullerenes)

Weathered quartz-rich river pebble (Likely quartzite or siliceous sandstone; exact identification requires testing) — sedimentary

Weathered quartz-rich river pebble

Likely quartzite or siliceous sandstone; exact identification requires testing

Pale rounded quartz-rich pebble, likely quartzite (Quartzite (mostly microcrystalline SiO₂), possibly quartz-rich sandstone or vein quartz) — metamorphic

Pale rounded quartz-rich pebble, likely quartzite

Quartzite (mostly microcrystalline SiO₂), possibly quartz-rich sandstone or vein quartz

Obsidian (Obsidian (principally SiO2 - Silicon Dioxide)) — igneous

Obsidian

Obsidian (principally SiO2 - Silicon Dioxide)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (70% or more silicon dioxide)) — Igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (70% or more silicon dioxide)

Obsidian (Volcanic Glass (SiO2, usually >70% silica content)) — Igneous

Obsidian

Volcanic Glass (SiO2, usually >70% silica content)

Obsidian (Obsidian (principally SiO2)) — igneous

Obsidian

Obsidian (principally SiO2)

Mixed polished river pebbles, predominantly quartzite and quartz (Quartzite (SiO₂), quartz (SiO₂), with possible feldspar-rich and iron-stained lithologies) — metamorphic

Mixed polished river pebbles, predominantly quartzite and quartz

Quartzite (SiO₂), quartz (SiO₂), with possible feldspar-rich and iron-stained lithologies

Probable rough basalt or mafic igneous fragment (Fine-grained basalt, likely plagioclase–pyroxene–olivine aggregate) — igneous

Probable rough basalt or mafic igneous fragment

Fine-grained basalt, likely plagioclase–pyroxene–olivine aggregate

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Peridot (Olivine ((Mg,Fe)2SiO4)) — Mineral

Peridot

Olivine ((Mg,Fe)2SiO4)

Obsidian (Volcanic glass (no mineral formula due to amorphous structure, mostly SiO2)) — igneous

Obsidian

Volcanic glass (no mineral formula due to amorphous structure, mostly SiO2)

Obsidian (Obsidian (principally SiO2)) — igneous

Obsidian

Obsidian (principally SiO2)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — Igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Fossiliferous limestone pebble (Calcite-rich limestone (CaCO₃), containing weathered shell or crinoid fragments) — sedimentary

Fossiliferous limestone pebble

Calcite-rich limestone (CaCO₃), containing weathered shell or crinoid fragments

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Obsidian (Volcanic Glass (predominantly SiO2, approximately 70% or more)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2, approximately 70% or more)

Obsidian (Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)) — igneous

Obsidian

Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)

Heart-shaped polished howlite (likely dyed or stabilized) (Howlite, Ca₂B₅SiO₉(OH)₅; possibly sold as imitation turquoise) — mineral

Heart-shaped polished howlite (likely dyed or stabilized)

Howlite, Ca₂B₅SiO₉(OH)₅; possibly sold as imitation turquoise

Weathered fossil bone fragment (identification uncertain) (Fossilized bone; exact taxon and mineral composition cannot be determined from the image) — fossil

Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image

Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Opalite (a synthetic glass) (Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant) — Mineral Simulant (Synthetic Glass)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Mineral Simulant (Synthetic Glass)

Fossiliferous limestone (Calcite-rich limestone (CaCO₃), containing possible shell or coral fragments) — sedimentary

Fossiliferous limestone

Calcite-rich limestone (CaCO₃), containing possible shell or coral fragments

Milky Quartz (Silicon Dioxide (SiO2)) — Mineral

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Quartzite (Metamorphic Quartz Rock (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz Rock (SiO2)

Gold Ore (Native Gold (Au)) — mineral

Gold Ore

Native Gold (Au)

Quartzite (Metamorphic Quartz Arenite) — metamorphic

Quartzite

Metamorphic Quartz Arenite

Sandstone (Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)) — Sedimentary Rock

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Sedimentary Rock

Quartzite (Quartzite (Metamorphic Quartz Arenite)) — metamorphic

Quartzite

Quartzite (Metamorphic Quartz Arenite)

Tumbled Obsidian (possibly Mahogany Obsidian variant) (Volcanic Glass (Amorphous Silicon Dioxide, SiO2)) — igneous

Tumbled Obsidian (possibly Mahogany Obsidian variant)

Volcanic Glass (Amorphous Silicon Dioxide, SiO2)

Baroque Pearl (Biogenic Calcium Carbonate (Aragonite/Conchiolin)) — mineral

Baroque Pearl

Biogenic Calcium Carbonate (Aragonite/Conchiolin)

Gold Ore (Gold bearing rock with native gold (Au)) — mineral

Gold Ore

Gold bearing rock with native gold (Au)

Quartzite (Metamorphic Quartz) — metamorphic

Quartzite

Metamorphic Quartz

Pyrite and Chalcopyrite in Fluorite Matrix (Calcium Fluoride (CaF2) with Iron Sulfide (FeS2)) — mineral

Pyrite and Chalcopyrite in Fluorite Matrix

Calcium Fluoride (CaF2) with Iron Sulfide (FeS2)

Chert (Nodule) (Chert (Silicon dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon dioxide, SiO2)

Engineered Quartz (Quartzite look-alike) (Silicon Dioxide (SiO2) composite) — mineral-based composite

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

mineral-based composite

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Black volcanic rock (possibly obsidian or basalt) (Indeterminate from the image; candidates include volcanic glass (obsidian, SiO₂-rich) or basalt (plagioclase–pyroxene-rich)) — igneous

Black volcanic rock (possibly obsidian or basalt)

Indeterminate from the image; candidates include volcanic glass (obsidian, SiO₂-rich) or basalt (plagioclase–pyroxene-rich)

Tumbled dark stone, likely basalt (Basalt; predominantly plagioclase feldspar, pyroxene, and commonly olivine) — igneous

Tumbled dark stone, likely basalt

Basalt; predominantly plagioclase feldspar, pyroxene, and commonly olivine

Obsidian (Obsidian (principally SiO2)) — igneous

Obsidian

Obsidian (principally SiO2)