Rock Identifier

Category

Synthetic Or Natural Fiber

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

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Almandine Garnet in Matrix (Almandine, Fe3Al2(SiO4)3) — metamorphic

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

metamorphic
Green Slate (Greenstone) (Metamorphic shale (varied composition)) — metamorphic

Green Slate (Greenstone)

Metamorphic shale (varied composition)

metamorphic
Limestone (Calcite (CaCO3)) — sedimentary

Limestone

Calcite (CaCO3)

sedimentary
Quartzite (River Pebble) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

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

Hematite

Hematite, Iron(III) oxide (Fe2O3)

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

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

sedimentary
Granite (Intrusive igneous rock (high SiO2)) — igneous

Granite

Intrusive igneous rock (high SiO2)

igneous
Basalt (Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

igneous
Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

mineraloid
Basalt (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

igneous
Sea Glass (specifically Frosted White) (Amorphous Silica (substance: Sodium-calcium silicate glass)) — Mineraloid (Anthropogenic/Man-made rock)

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Mineraloid (Anthropogenic/Man-made rock)
Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

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

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

mineral
White Quartz Sphere (Silicon Dioxide (SiO2)) — mineral

White Quartz Sphere

Silicon Dioxide (SiO2)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Basalt (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

igneous
Granite (Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

igneous
Muscovite on Quartz (Mica host rock) (KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)) — igneous/metamorphic

Muscovite on Quartz (Mica host rock)

KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)

igneous/metamorphic
Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

sedimentary
Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

igneous
Chert (Nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Banded Quartz (Silicon Dioxide (SiO2)) — mineral

Banded Quartz

Silicon Dioxide (SiO2)

mineral
Jasper with Quartz vein (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Quartz vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

igneous
Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

mineral
Agate (Banded Chalcedony (SiO2)) — mineral

Agate

Banded Chalcedony (SiO2)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Chrysocolla in Matrix (Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)) — mineral

Chrysocolla in Matrix

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

mineral
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Bauxite (Aluminum Ore) (Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)) — sedimentary

Bauxite (Aluminum Ore)

Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)

sedimentary
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Botryoidal Quartz / Calcite Geode crust (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)) — mineral

Botryoidal Quartz / Calcite Geode crust

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

mineral
Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)

mineral
Basalt (Basalt (Aphanitic-to-porphyritic mafic volcanic rock)) — igneous

Basalt

Basalt (Aphanitic-to-porphyritic mafic volcanic rock)

igneous
Quartz Crystal Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Azurite in Matrix (Azurite (Cu3(CO3)2(OH)2)) — mineral

Azurite in Matrix

Azurite (Cu3(CO3)2(OH)2)

mineral