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

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Granite (Granite (Phaneritic Quartz-Feldspar-Mica composite)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar-Mica composite)

Ruby in Matrix (Corundum (Al2O3)) — mineral

Ruby in Matrix

Corundum (Al2O3)

Black Onyx (Silicon dioxide / Chalcedony (SiO2)) — mineral

Black Onyx

Silicon dioxide / Chalcedony (SiO2)

Concrete Rubble with Aggregate (Hardened Portland Cement Paste with Coarse Aggregate) — Anthropogenic (Man-made)

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Anthropogenic (Man-made)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond (Diamond (Pure Carbon, C)) — Mineral

Diamond

Diamond (Pure Carbon, C)

Diamond (or Cubic Zirconia) (C (Carbon) or ZrO2 (Zirconium Dioxide)) — mineral

Diamond (or Cubic Zirconia)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Blue Sapphire (Tumbled/Polished) (Corundum (Al2O3)) — mineral

Blue Sapphire (Tumbled/Polished)

Corundum (Al2O3)

Yellow Quartz (Citrine Quartzite) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass, SiO2)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2)

Precious Red Coral (Corallium rubrum (Calcium Carbonate, CaCO3)) — gemstone

Precious Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Shale (sub-type: Carbonaceous Shale) (Lutaceous Sedimentary Rock) — sedimentary

Shale (sub-type: Carbonaceous Shale)

Lutaceous Sedimentary Rock

Shale with Iron Staining (Fissile Argillaceous Sedimentary Rock) — sedimentary

Shale with Iron Staining

Fissile Argillaceous Sedimentary Rock

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (likely Ferruginous) (Arenite (SiO2 based with Fe2O3/FeO(OH) cement)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Diamond inlaid in Jewelry (Carbon (C)) — mineral

Diamond inlaid in Jewelry

Carbon (C)

Sandstone (Quartz-rich) (Arenite (SiO2 based)) — sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2 based)

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond (in a metal ring setting) (Diamond (Pure Carbon, C)) — mineral

Diamond (in a metal ring setting)

Diamond (Pure Carbon, C)

Black Pearl (Tahitian Type) (Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)) — Organic Gemstone

Black Pearl (Tahitian Type)

Aragonite / Pinctada margaritifera (CaCO3 + Conchiolin)

Organic Gemstone

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Shale (Fissile Siliciclastic Sedimentary Rock) — sedimentary

Shale

Fissile Siliciclastic Sedimentary Rock

Stalagmite (Flowstone) (Speleothem (Calcium Carbonate, CaCO3)) — sedimentary

Stalagmite (Flowstone)

Speleothem (Calcium Carbonate, CaCO3)

Heat-Treated Citrine (Amethyst) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Red Sandstone Pebble (Arenite with Hematite (Fe2O3) cement) — sedimentary

Red Sandstone Pebble

Arenite with Hematite (Fe2O3) cement

Tiger Diamond / Hematite-infused Quartzite (Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)) — metamorphic

Tiger Diamond / Hematite-infused Quartzite

Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)

Chrysocolla and Malachite Beads (Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)) — mineral

Chrysocolla and Malachite Beads

Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)

Desert Rose (Baryte (BaSO4) or Gypsum (CaSO4·2H2O) with sand inclusions) — mineral

Desert Rose

Baryte (BaSO4) or Gypsum (CaSO4·2H2O) with sand inclusions

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Magnetite / Ironstone (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite / Ironstone

Iron(II,III) oxide (Fe3O4)

Fulgurite (Fulgurite (Lechatelierite-rich variety)) — metamorphic

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Pyrite Geode (Iron Disulfide (FeS2)) — mineral

Pyrite Geode

Iron Disulfide (FeS2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Aura Quartz (Titanium-coated Quartz) (Silicon Dioxide (SiO2) with metallic vapor coating) — mineral

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Corundum (Sapphire in Host Rock) (Corundum (Aluminum Oxide, Al2O3)) — mineral

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)