Rock Identifier

Category

Man Made (Synthetic Rock)

Browse man made (synthetic rock) specimens identified by the Rock Identifier community.

Learn about Man Made (Synthetic Rock) in the encyclopedia

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Zincite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Lead Feldspar

Map Jasper

Goldstone

Blue-green opal, likely polished common or synthetic opal (Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain) — gemstone

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Granodiorite (Intrusive Igneous Rock) — igneous

Granodiorite

Intrusive Igneous Rock

Tumbled yellow chalcedony (possibly citrine or pale agate) (Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually) — mineral

Tumbled yellow chalcedony (possibly citrine or pale agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually

Granite / Diorite (Granodiorite) (Granodiorite / Quartz Diorite) — igneous

Granite / Diorite (Granodiorite)

Granodiorite / Quartz Diorite

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone (Quartz, silicon dioxide (SiO₂)) — gemstone

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone

Quartz, silicon dioxide (SiO₂)

Possible yellow agate or chalcedony bead (Microcrystalline quartz (SiO₂), likely chalcedony; identification is uncertain from the photo) — mineral

Possible yellow agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony; identification is uncertain from the photo

Coal (Bituminous Coal) (Caustobiolith / Sedimentary Rock) — sedimentary

Coal (Bituminous Coal)

Caustobiolith / Sedimentary Rock

White flint (chert) (Microcrystalline quartz, SiO₂) — sedimentary

White flint (chert)

Microcrystalline quartz, SiO₂

Colorless faceted gemstones, likely quartz (rock crystal) (Quartz, silicon dioxide (SiO₂), trigonal crystal system) — gemstone

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Weathered concrete or cementitious slab (not natural rock) (Artificial calcium-silicate cement composite; likely Portland cement concrete) — sedimentary

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Sandstone (Arenite (with iron oxide cement)) — sedimentary

Sandstone

Arenite (with iron oxide cement)

Pink Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Ruby-bearing rock (likely ruby in zoisite) (Corundum (ruby, Al₂O₃) in a zoisite-rich matrix; exact identification is uncertain from the photograph) — metamorphic

Ruby-bearing rock (likely ruby in zoisite)

Corundum (ruby, Al₂O₃) in a zoisite-rich matrix; exact identification is uncertain from the photograph

Sandstone Concretion (Sedimentary concretion) — Sedimentary

Sandstone Concretion

Sedimentary concretion

Quartzite (Metamorphic Quartz Rock (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz Rock (SiO2)

Ruby Lavender Quartz with Amethyst (Silicon dioxide with neodymium dopant (SiO2)) — gemstone

Ruby Lavender Quartz with Amethyst

Silicon dioxide with neodymium dopant (SiO2)

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

Rough Sapphire (Corundum)

Corundum (Al2O3)

Colorless faceted gemstone (likely cubic zirconia) (Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation) — gemstone

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation

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

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Quartz geode with druzy crystals (Quartz (SiO₂), likely with iron-oxide staining and darker host rock) — mineral

Quartz geode with druzy crystals

Quartz (SiO₂), likely with iron-oxide staining and darker host rock

Black Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Faceted colorless gemstone, likely quartz (rock crystal) (Quartz, SiO₂) — gemstone

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Rainbow Hematite / Magnetic Hematite (Iron oxide (Fe2O3) - often synthetic/coated for beads) — mineral

Rainbow Hematite / Magnetic Hematite

Iron oxide (Fe2O3) - often synthetic/coated for beads

Lapis Lazuli (Lapis Lazuli (Rock composed chiefly of lazurite, calcite, and pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock composed chiefly of lazurite, calcite, and pyrite)

Silicon (Element Si) — mineral

Silicon

Element Si

Siltstone Pebble (Siltstone (composed of microscopic quartz and clay minerals)) — sedimentary

Siltstone Pebble

Siltstone (composed of microscopic quartz and clay minerals)

Hematite cameo or hematine imitation (Hematite (Fe₂O₃); possibly synthetic hematine or black glass) — mineral

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Colorless faceted gemstone, likely cubic zirconia (Cubic zirconia (zirconium dioxide, ZrO₂); visual confirmation is unavailable) — gemstone

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual confirmation is unavailable

Greenstone (Metabasalt / Metavolcanic rock) — metamorphic

Greenstone

Metabasalt / Metavolcanic rock

Chert (Chert (Microcrystalline Quartz)) — sedimentary

Chert

Chert (Microcrystalline Quartz)

Granite (Granite (a plutonic rock)) — Igneous

Granite

Granite (a plutonic rock)

Chert (Flint) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon dioxide (SiO2)

Gemstone ring (stones not identifiable from image) (Unknown; the ring appears to contain two yellow stones and one colorless stone, possibly faceted gemstones or simulants) — gemstone

Gemstone ring (stones not identifiable from image)

Unknown; the ring appears to contain two yellow stones and one colorless stone, possibly faceted gemstones or simulants

Turquoise-colored ring stone (possibly turquoise or imitation) (Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image) — gemstone

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Granite (Granite (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Vesicular Basalt (or Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (or Scoria)

Vesicular Basalt

Granodiorite (Phaneritic Plutonic Intermediate-Felsic Rock) — igneous

Granodiorite

Phaneritic Plutonic Intermediate-Felsic Rock

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

Diamond (or Cubic Zirconia)

Cubic Carbon (C) or Zirconium Dioxide (ZrO2)

Red gemstone, likely ruby (Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the photo) — gemstone

Red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the photo

Star sapphire ring (Corundum (Al₂O₃), likely asteriated sapphire) — gemstone

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Chert (Flint/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Dalmatian Stone (Dalmatian Stone (Felsic Igneous Rock)) — igneous

Dalmatian Stone

Dalmatian Stone (Felsic Igneous Rock)