Rock Identifier

Category

Synthetic Or Natural Fiber

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

Lapis Lazuli (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Pink Garnet (likely Almandine or Rhodolite) (Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)) — mineral

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Banded Calcite (often sold as Mexican Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often sold as Mexican Onyx)

Calcium Carbonate (CaCO3)

Basalt (Basalt (Mafic igneous rock)) — igneous

Basalt

Basalt (Mafic igneous rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt (Basalt (Vitreous to Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Vitreous to Aphanitic Mafic Igneous Rock)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Malachite (Copper carbonate hydroxide Cu2CO3(OH)2) — mineral

Malachite

Copper carbonate hydroxide Cu2CO3(OH)2

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

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

Rhodonite

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

Mother of Pearl and Onyx (Aragonite (Mother of Pearl) and Chalcedony (Onyx)) — mineral

Mother of Pearl and Onyx

Aragonite (Mother of Pearl) and Chalcedony (Onyx)

Native Silver (Silver (elemental Ag)) — mineral

Native Silver

Silver (elemental Ag)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Trilobite Fossil (Flexicalymene) (Flexicalymene ouzregui) — sedimentary

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Calcite (often sold as Onyx or Mexican Onyx) (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as Onyx or Mexican Onyx)

Calcite (Calcium Carbonate, CaCO3)

Quartz Geode (Silicon Dioxide (SiO2) in Host Rock) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper with Dendritic Inclusions (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Quartz Geode (with Calcite influence) (Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)) — mineral

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Howlite (Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Ferruginous Sandstone (Arenite with Hematite/Limonite cement) — sedimentary

Ferruginous Sandstone

Arenite with Hematite/Limonite cement

Quartzite (Quartzite (predominantly SiO2)) — metamorphic

Quartzite

Quartzite (predominantly SiO2)

Quartz Geode (Cracked Open) (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Amber (Succinite (fossilized tree resin)) — mineral

Amber

Succinite (fossilized tree resin)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Gold Ore in Quartz/Schist (Auriferous Quartz and Sulfide-bearing Schist) — Metamorphic/Igneous (Hydrothermal)

Gold Ore in Quartz/Schist

Auriferous Quartz and Sulfide-bearing Schist

Metamorphic/Igneous (Hydrothermal)

Native Gold (in earring form) (Gold (Au)) — mineral

Native Gold (in earring form)

Gold (Au)

Granite Pebble (Pink Granite) (Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)) — igneous

Granite Pebble (Pink Granite)

Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Chert (Limestone-based) (Silicon Dioxide (SiO2) within Carbonate host) — sedimentary

Chert (Limestone-based)

Silicon Dioxide (SiO2) within Carbonate host

Sulfur on Quartz (Native Sulfur (S8) with Quartz (SiO2)) — mineral

Sulfur on Quartz

Native Sulfur (S8) with Quartz (SiO2)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)