Rock Identifier

Category

Synthetic Or Natural Fiber

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

Granite (Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Granite (Granite (compositional mixture of Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (compositional mixture of Quartz, Feldspar, and Mica)

Sandstone Beach Pebble (Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)) — sedimentary

Sandstone Beach Pebble

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)

Blue Quartz (specifically Dumortierite Quartz) (SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)) — mineral

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

Blue Lace Agate (often dyed) (Silicon dioxide (SiO2) - variety of chalcedony) — mineral

Blue Lace Agate (often dyed)

Silicon dioxide (SiO2) - variety of chalcedony

Amethyst (Silicon Dioxide with trace inclusions of Iron (SiO2)) — mineral

Amethyst

Silicon Dioxide with trace inclusions of Iron (SiO2)

Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Amethyst (Amethyst (Silicon Dioxide with iron impurities, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Coquina / Shelly Limestone (Bioclastic Limestone (composed of CaCO3)) — sedimentary

Coquina / Shelly Limestone

Bioclastic Limestone (composed of CaCO3)

Polychrome Jasper (Silicon Dioxide (SiO2) with iron and other mineral inclusions) — sedimentary

Polychrome Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Stichtite in Serpentine (Atlantasite) (Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)) — Metamorphic rock / Mineral variety

Stichtite in Serpentine (Atlantasite)

Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)

Metamorphic rock / Mineral variety

Rough Diamond (Native Carbon (C)) — mineral

Rough Diamond

Native Carbon (C)

Rough Diamond (Diamond (pure carbon / C)) — mineral

Rough Diamond

Diamond (pure carbon / C)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Pink Sapphire (Corundum (Al2O3 with Chromium/Titanium/Iron traces)) — mineral

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

Amethyst (Tumbled) (Purple Quartz (SiO2 with iron impurities and irradiation)) — mineral

Amethyst (Tumbled)

Purple Quartz (SiO2 with iron impurities and irradiation)

Goldstone (Not a natural mineral or rock. It is an ornamental glass.) — Manufactured Glass (Simulant)

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Manufactured Glass (Simulant)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Yellow Aventurine (Quartzite with Muscovite/Sericite inclusions (SiO2)) — metamorphic

Yellow Aventurine

Quartzite with Muscovite/Sericite inclusions (SiO2)

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

Lapis Lazuli (Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone (with Iron Staining) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Blue Topaz (facetted in jewelry) (Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)) — mineral

Blue Topaz (facetted in jewelry)

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

Glauconitic Sandstone (Greensand) (Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Granite (Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

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

Smoky Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Peacock Ore (Bornite (Cu5FeS4)) — mineral

Peacock Ore

Bornite (Cu5FeS4)

Turquenite (Dyed Howlite) (Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)) — mineral

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Granite Pebble (Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Pink Dyed Agate (Banded Chalcedony) (Silicon dioxide (SiO2) - variety Chalcedony) — mineral

Pink Dyed Agate (Banded Chalcedony)

Silicon dioxide (SiO2) - variety Chalcedony

Amethyst (Silicon dioxide (SiO2)) — mineral

Amethyst

Silicon dioxide (SiO2)

Smoky Quartz (Chlorite Inclusions) (Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation) — mineral

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Smoky Quartz (Smoky Quartz (SiO2: Silicon Dioxide)) — mineral

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)