Rock Identifier

Category

Synthetic Or Natural Fiber

Browse synthetic or natural fiber specimens identified by the Rock Identifier community.

Pebble (Likely Basalt or Siltstone) (Clastic sedimentary rock or mafic volcanic rock) — Igneous or Sedimentary

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Igneous or Sedimentary
Green Quartzite (River Stone) (Metamorphic Quartz (SiO2) with inclusions (typically Fuchsite or Chlorite)) — metamorphic

Green Quartzite (River Stone)

Metamorphic Quartz (SiO2) with inclusions (typically Fuchsite or Chlorite)

metamorphic
Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

mineral
Polished Rhodonite Obelisk (Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3) — metamorphic

Polished Rhodonite Obelisk

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3

metamorphic
Moonstone (Orthoclase Feldspar ((K,Na)AlSi3O8)) — mineral

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

mineral
Rhodonite (Rhodonite (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

mineral
Peridot (Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

mineral
Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

mineral
Pink Granite (Phaneritic Quartz-Feldspar Plutonic Rock) — igneous

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

igneous
Lepidolite on Pegmatite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite on Pegmatite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

mineral
Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

mineral
Iron Slag (Anthropogenic Iron Silicate) — industrial byproduct

Iron Slag

Anthropogenic Iron Silicate

industrial byproduct
Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral
Halite (Halite (Sodium Chloride, NaCl)) — mineral

Halite

Halite (Sodium Chloride, NaCl)

mineral
Chert (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Conglomerate (Polymictic Conglomerate) — sedimentary

Conglomerate

Polymictic Conglomerate

sedimentary
Quartz (Citrine or Smoky variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Smoky variant)

Silicon Dioxide (SiO2)

mineral
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

mineral
Bamboo Leaf Jasper (Silicified Siltstone or Jasper (SiO2)) — sedimentary

Bamboo Leaf Jasper

Silicified Siltstone or Jasper (SiO2)

sedimentary
Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

mineral
Ruby in Kyanite (Corundum (Al2O3) in Kyanite (Al2SiO5)) — metamorphic

Ruby in Kyanite

Corundum (Al2O3) in Kyanite (Al2SiO5)

metamorphic
Specular Hematite (Polished Sphere) (Hematite (Alpha Fe2O3)) — mineral

Specular Hematite (Polished Sphere)

Hematite (Alpha Fe2O3)

mineral
Pyrite in Matrix (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Basalt (Basalt (composition of plagioclase feldspar and pyroxene)) — Igneous

Basalt

Basalt (composition of plagioclase feldspar and pyroxene)

Igneous
Quartzite (Quartzite (mainly Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (mainly Silicon Dioxide, SiO2)

metamorphic
Vesicular Basalt (Scoria) (Aphanitic Mafic Igneous Rock (Vesicular Basalt)) — igneous

Vesicular Basalt (Scoria)

Aphanitic Mafic Igneous Rock (Vesicular Basalt)

igneous
Quartz (specifically Clear Quartz or Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Scoria (Lava Rock) (Scoria (extrusive volcanic rock)) — igneous

Scoria (Lava Rock)

Scoria (extrusive volcanic rock)

igneous
Slate with Pyrite Inclusions (Foliated Metamorphic Rock (with Iron Sulfide FE-S2)) — metamorphic

Slate with Pyrite Inclusions

Foliated Metamorphic Rock (with Iron Sulfide FE-S2)

metamorphic
Lapis Lazuli (polished cabochon) (Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli (polished cabochon)

Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)

metamorphic
Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

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

Shungite

Non-crystalline carbon (Fullerenes)

metamorphic
Garnet (specifically Almandine) (Almandine - Fe3Al2(SiO4)3) — metamorphic

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

metamorphic
Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

igneous
Sulfur (on Matrix) (Native Sulfur (S8)) — mineral

Sulfur (on Matrix)

Native Sulfur (S8)

mineral
Chrysocolla in Cuprite (Sonora Sunrise) (Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) with Cu2O) — mineral

Chrysocolla in Cuprite (Sonora Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) with Cu2O

mineral