Rock Identifier

Category

Synthetic Or Natural Fiber

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

Learn about Synthetic Or Natural Fiber in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zircon

Zircon

Oregon Opal

Oregon Opal

Orendite

Orendite

Orthoclase

Orthoclase

Orca Agate

Orca Agate

Orange Opal

Orange Opal

Peacock Ore

Peacock Ore

Orange Garnet

Orange Garnet

Oregon Sunstone

Oregon Sunstone

Orange Obsidian

Orange Obsidian

Orange Calcite

Orange Calcite

Dream Amethyst (Chevron Amethyst) (Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)) — mineral

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Blue Dyed Agate (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Blue Dyed Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Painted Sandstone Cobble (Clastic Sedimentary Rock (Sandstone base)) — sedimentary

Painted Sandstone Cobble

Clastic Sedimentary Rock (Sandstone base)

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)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Sapphire (Rough) (Corundum (Al2O3)) — mineral

Sapphire (Rough)

Corundum (Al2O3)

Dyed Dragon Vein Agate (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Diamond (in jewelry setting) (Diamond (C - Carbon)) — mineral

Diamond (in jewelry setting)

Diamond (C - Carbon)

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

Hematite

Iron(III) oxide (Fe2O3)

Amethyst (Chevron or Banded Amethyst) (Silicon Dioxide (SiO2 with iron impurities)) — Mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2 with iron impurities)

Jasper (Silicon dioxide / Chalcedony (SiO2)) — Sedimentary

Jasper

Silicon dioxide / Chalcedony (SiO2)

Tumbled Purple Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Tumbled Purple Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Rough Diamond (Carbon (C)) — mineral

Rough Diamond

Carbon (C)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Chalcedony (Smoky Quartz or Agate nodule fragment) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Smoky Quartz or Agate nodule fragment)

Silicon Dioxide (SiO2)

Blue Sapphire (Raw/Tumbled Corundum) (Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)) — mineral

Blue Sapphire (Raw/Tumbled Corundum)

Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)

Howlite and Tree Agate (Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Agate/Quartz)) — mineral

Howlite and Tree Agate

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Agate/Quartz)

Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

Ruby in Marble (Corundum (Al2O3) in Calcite (CaCO3) matrix) — metamorphic

Ruby in Marble

Corundum (Al2O3) in Calcite (CaCO3) matrix

Blue Agate (Dyed Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

River Jasper (Green Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

River Jasper (Green Jasper)

Silicon Dioxide (SiO2) with impurities

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Black Onyx (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Black Onyx (Tumbled)

Silicon Dioxide (SiO2)

Quartz (Water-worn pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Emerald in Matrix (Quartz/Schist) (Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Rough Ruby (Corundum) in Zoisite Matrix (Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)) — mineral

Rough Ruby (Corundum) in Zoisite Matrix

Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Chert (Yellow Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Chert (Flint variety) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint variety)

Chert (Cryptocrystalline Quartz, SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Gold Nuggests (Native Gold (Au)) — mineral

Gold Nuggests

Native Gold (Au)

Heat-Treated Citrine (Quartz (Silicon Dioxide, SiO2)) — mineral

Heat-Treated Citrine

Quartz (Silicon Dioxide, SiO2)

Pink Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Pink Granite (Water-worn Cobble) (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite (Water-worn Cobble)

Phaneritic Felsic Intrusive Igneous Rock

Jasper and Agate (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Agate

Microcrystalline Quartz (SiO2)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)