Rock Identifier

Category

Industrial By Product

Browse industrial by product specimens identified by the Rock Identifier community.

Learn about Industrial By Product in the encyclopedia

Adirondack Garnet

Adirondack Garnet

Brazilian Agate

Brazilian Agate

Almandine Garnet

Almandine Garnet

Tripolite

Diatomaceous Earth

Vanadium Tourmaline

Vanadium Tourmaline

Seam Agate

Cat's Eye Obsidian

Perthite

Orange Tourmaline

Orange Tourmaline

Pink Agate

Purple Agate

Epidote (Unakite-related) (Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote (Unakite-related)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Scoria (volcanic cinder) (Scoria, vesicular basaltic-to-andesitic volcanic rock) — igneous

Scoria (volcanic cinder)

Scoria, vesicular basaltic-to-andesitic volcanic rock

Tumbled amethyst (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation) — gemstone

Tumbled amethyst

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂), likely massive milky quartz) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), likely massive milky quartz

Pumice or vesicular volcanic rock (Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)) — igneous

Pumice or vesicular volcanic rock

Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)

Pumice (Pumice (Vesicular Rhyolite/Andesite)) — igneous

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Chert (Sedimentary Rock) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Sedimentary Rock)

Silicon Dioxide (SiO2)

Tumbled milky quartz (probable) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz pebble (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Kyanite in Quartz (Kyanite (Al2SiO5) with Quartz (SiO2) matrix) — metamorphic

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

Limestone (Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Limestone

Limestone (Calcium Carbonate - CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Likely blue kyanite (Kyanite, Al₂SiO₅) — mineral

Likely blue kyanite

Kyanite, Al₂SiO₅

Clear quartz crystal (likely) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Raw ruby (corundum) (Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium) — gemstone

Raw ruby (corundum)

Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium

Rounded quartz-rich pebble (Quartz-bearing lithic clast; exact rock type indeterminate from image) — sedimentary

Rounded quartz-rich pebble

Quartz-bearing lithic clast; exact rock type indeterminate from image

White quartz pebble (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz geode (Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity) — mineral

Quartz geode

Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity

Blue-green turquoise-like tumbled stone (Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O) — mineral

Blue-green turquoise-like tumbled stone

Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Pumice (Pumice (a frothy volcanic glass)) — igneous

Pumice

Pumice (a frothy volcanic glass)

Quartzite with Hematite staining (Quartzite (SiO2)) — metamorphic

Quartzite with Hematite staining

Quartzite (SiO2)

Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Sea Glass (Amorphous silicon dioxide (man-made glass weathered by nature)) — mineral

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Sea Glass (Amorphous silicon dioxide (Man-made glass weathered by nature)) — mineral

Sea Glass

Amorphous silicon dioxide (Man-made glass weathered by nature)

Tumbled sodalite (Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂) — mineral

Tumbled sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Iron-stained quartz-rich rock (possibly ironstone or ochre-coated quartz) (Undetermined ferruginous rock; yellow-brown coloration likely from goethite and/or limonite (hydrated iron oxides)) — sedimentary

Iron-stained quartz-rich rock (possibly ironstone or ochre-coated quartz)

Undetermined ferruginous rock; yellow-brown coloration likely from goethite and/or limonite (hydrated iron oxides)

Botryoidal hematite (ironstone) (Hematite, α-Fe₂O₃, likely with goethite and iron-rich matrix) — mineral

Botryoidal hematite (ironstone)

Hematite, α-Fe₂O₃, likely with goethite and iron-rich matrix

Green Sea Glass (Man-made silicate glass (weathered)) — sedimentary

Green Sea Glass

Man-made silicate glass (weathered)

Polished white marble tile (Calcite marble (predominantly CaCO₃)) — metamorphic

Polished white marble tile

Calcite marble (predominantly CaCO₃)

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

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — Mineral

Hematite

Iron(III) oxide (Fe2O3)

Prehnite (Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)) — mineral

Prehnite

Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)

Weathered, vesicular volcanic rock (likely basaltic scoria) (Scoria, probably basaltic; exact identification requires testing) — igneous

Weathered, vesicular volcanic rock (likely basaltic scoria)

Scoria, probably basaltic; exact identification requires testing

Tumbled copper-bearing rock, likely cuprite-rich matrix (Cuprite (Cu₂O) with native copper and iron-oxide matrix; visual identification is provisional) — mineral

Tumbled copper-bearing rock, likely cuprite-rich matrix

Cuprite (Cu₂O) with native copper and iron-oxide matrix; visual identification is provisional

Weathered iron-rich limestone or altered volcanic rock (Probable limonite/goethite-bearing calcite rock; exact identification requires testing) — sedimentary

Weathered iron-rich limestone or altered volcanic rock

Probable limonite/goethite-bearing calcite rock; exact identification requires testing