Rock Identifier

Category

Man Made Material

Browse man made material specimens identified by the Rock Identifier community.

Learn about Man Made Material in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Mint Obsidian

Crimson Obsidian

Lherzolite

Violet Obsidian

Tangerine Obsidian

Pastel Obsidian

Lilac Obsidian

Banded sandstone pebble (Lithic or quartz-rich sandstone; exact composition requires testing) — sedimentary

Banded sandstone pebble

Lithic or quartz-rich sandstone; exact composition requires testing

Peridotite (Dunite/Lherzolite) (Ultramafic Peridotite) — igneous

Peridotite (Dunite/Lherzolite)

Ultramafic Peridotite

Serpentine (Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4

Iridescent schist or phyllite (Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite) — metamorphic

Iridescent schist or phyllite

Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen) (Quartz, SiO₂, in an unidentified dark silicate matrix) — mineral

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen)

Quartz, SiO₂, in an unidentified dark silicate matrix

Weathered quartz-rich rock, likely quartzite or quartz vein (Quartzite; predominantly quartz (SiO₂), possibly iron-oxide stained) — metamorphic

Weathered quartz-rich rock, likely quartzite or quartz vein

Quartzite; predominantly quartz (SiO₂), possibly iron-oxide stained

Iron-stained chert or siliceous pebble (Microcrystalline quartz (SiO₂), likely ferruginous chert) — sedimentary

Iron-stained chert or siliceous pebble

Microcrystalline quartz (SiO₂), likely ferruginous chert

Quartz-rich rock fragment (Microcrystalline quartz (SiO₂), possibly chalcedony or quartz-bearing breccia) — mineral

Quartz-rich rock fragment

Microcrystalline quartz (SiO₂), possibly chalcedony or quartz-bearing breccia

Likely dark green-gray metamorphic pebble (Indeterminate; possibly chlorite schist, serpentinite, or amphibolite) — metamorphic

Likely dark green-gray metamorphic pebble

Indeterminate; possibly chlorite schist, serpentinite, or amphibolite

Weathered limestone (Calcite-rich limestone (CaCO₃), possibly fossiliferous) — sedimentary

Weathered limestone

Calcite-rich limestone (CaCO₃), possibly fossiliferous

Quartz-rich hydrothermal ore rock, likely gold-bearing quartz vein (Milky quartz (SiO₂) with iron-oxide staining and probable sulfide minerals; host rock may be schist or altered granite) — metamorphic

Quartz-rich hydrothermal ore rock, likely gold-bearing quartz vein

Milky quartz (SiO₂) with iron-oxide staining and probable sulfide minerals; host rock may be schist or altered granite

Iron-stained quartz-bearing rock (Quartz (SiO₂), likely in a limonite/goethite-rich matrix) — mineral

Iron-stained quartz-bearing rock

Quartz (SiO₂), likely in a limonite/goethite-rich matrix

Milky quartz with iron staining (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz with iron staining

Quartz, silicon dioxide (SiO₂)

Flint Pebble (Sedimentary cryptocrystalline quartz (SiO2)) — sedimentary

Flint Pebble

Sedimentary cryptocrystalline quartz (SiO2)

Synthetic Wolf Plush (Non-mineral) (Canis lupus similis (Prop material: Polyester & Synthetic fibers)) — Synthetic material/Textile

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Synthetic material/Textile

Petrified Wood (Silicified Wood (primarily SiO₂)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO₂)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Milky Quartz with Dendritic Inclusions (Silicon Dioxide (SiO2) with impurities) — mineral

Milky Quartz with Dendritic Inclusions

Silicon Dioxide (SiO2) with impurities

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

Diamond

Diamond (pure Carbon, C)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Magnetite-rich iron ore (Magnetite (Fe₃O₄), possibly with hematite and silicate matrix) — mineral

Magnetite-rich iron ore

Magnetite (Fe₃O₄), possibly with hematite and silicate matrix

Granite (Phaneritic Intrusive Igneous Rock (primarily composed of SiO2, Al2O3, K2O, Na2O)) — igneous

Granite

Phaneritic Intrusive Igneous Rock (primarily composed of SiO2, Al2O3, K2O, Na2O)

Diamond (or Cubic Zirconia imitation) (Carbon (C) - Native Element) — mineral

Diamond (or Cubic Zirconia imitation)

Carbon (C) - Native Element

Peridotite (Pyroxenite/Serpentinized Dunite) (Ultramafic Rock (consisting primarily of Olivine and Pyroxene)) — igneous

Peridotite (Pyroxenite/Serpentinized Dunite)

Ultramafic Rock (consisting primarily of Olivine and Pyroxene)

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

Diamond

Diamond (Pure Carbon, C)

Diamond (Carbon (C), Native Element) — mineral

Diamond

Carbon (C), Native Element

Zebra Jasper (Opaque microcrystalline Quartz (SiO2) with impurities) — sedimentary

Zebra Jasper

Opaque microcrystalline Quartz (SiO2) with impurities

Tumbled milky quartz (probable) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

Red Quartzite River Pebble (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

River Stone / Siltstone (Siltstone (composed of lithified silt)) — sedimentary

River Stone / Siltstone

Siltstone (composed of lithified silt)

Zebra Jasper (Tumbled Opaque Chalcedony (SiO2)) — sedimentary

Zebra Jasper

Tumbled Opaque Chalcedony (SiO2)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Dalmatian jasper (Orbicular rhyolite, commonly sold as Dalmatian jasper; mainly quartz, feldspar, and altered mafic minerals) — igneous

Dalmatian jasper

Orbicular rhyolite, commonly sold as Dalmatian jasper; mainly quartz, feldspar, and altered mafic minerals

Quartzite (Quartzite (Metamorphosed Quartz Sandstone)) — metamorphic

Quartzite

Quartzite (Metamorphosed Quartz Sandstone)

Likely polished garnet fragment (Garnet group, possibly almandine (Fe₃Al₂Si₃O₁₂)) — gemstone

Likely polished garnet fragment

Garnet group, possibly almandine (Fe₃Al₂Si₃O₁₂)

Basalt (Vesicular) (Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene) — igneous

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

Dendritic Agate (Tree Agate) (Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate (Tree Agate)

Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions

Petrified wood (Silicified wood, chiefly microcrystalline quartz (SiO₂)) — fossil

Petrified wood

Silicified wood, chiefly microcrystalline quartz (SiO₂)

Chert (Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Silica, SiO2)

Green Fluorite in Host Rock (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite in Host Rock

Fluorite (Calcium Fluoride, CaF2)

River Quartzite Spheroid (Recrystallized Orthoquartzite (SiO2)) — metamorphic

River Quartzite Spheroid

Recrystallized Orthoquartzite (SiO2)

Basalt (Basalt (a mafic extrusive igneous rock)) — Igneous

Basalt

Basalt (a mafic extrusive igneous rock)