Rock Identifier

Category

Manufactured Glass

Browse manufactured glass specimens identified by the Rock Identifier community.

Learn about Manufactured Glass in the encyclopedia

Green Obsidian

Blue Obsidian

Lavender Obsidian

Violet Obsidian

Yellow Obsidian

Yellow Obsidian

Crimson Obsidian

Tangerine Obsidian

Lilac Obsidian

Mint Obsidian

Orange Obsidian

Electric Blue Obsidian

Pink Lady Obsidian

Colorless faceted gemstone (most likely synthetic cubic zirconia) (Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond) — gemstone

Colorless faceted gemstone (most likely synthetic cubic zirconia)

Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond

Unidentified small mineral fragment (Possibly quartz or feldspar-bearing rock; exact identification is uncertain from the image) — mineral

Unidentified small mineral fragment

Possibly quartz or feldspar-bearing rock; exact identification is uncertain from the image

Black Opal (Triplet) (Hydrated Silica (SiO2·nH2O)) — mineral

Black Opal (Triplet)

Hydrated Silica (SiO2·nH2O)

Cullet Glass (Slag) (Amorphous Silicon Dioxide (Man-made)) — Mineraloid

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Faceted citrine-colored gemstone (Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem) — gemstone

Faceted citrine-colored gemstone

Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Obsidian (Volcanic glass (SiO2-rich amorphous silicate)) — igneous

Obsidian

Volcanic glass (SiO2-rich amorphous silicate)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Portable Ceramic Space Heater (Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements) — not a rock (synthetic/industrial object)

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

not a rock (synthetic/industrial object)

Likely quartz-rich brown rock, possibly iron-stained quartz or quartzite (Quartz (SiO₂), possibly in quartzite or iron-oxide-bearing vein material) — mineral

Likely quartz-rich brown rock, possibly iron-stained quartz or quartzite

Quartz (SiO₂), possibly in quartzite or iron-oxide-bearing vein material

Blue Goldstone (Goldstone (artificial glass)) — Mineral (man-made glass, not natural)

Blue Goldstone

Goldstone (artificial glass)

Mineral (man-made glass, not natural)

Colorless faceted quartz-like gemstone (Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia) — gemstone

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Cullet Glass / Slag Glass (Amorphous silica glass) — man-made glass / industrial byproduct

Cullet Glass / Slag Glass

Amorphous silica glass

man-made glass / industrial byproduct

Possible tumbled jasper or iron-rich chert (Microcrystalline quartz (SiO₂), commonly colored by iron oxides) — mineral

Possible tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material) (Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating) — mineral

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)

Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating

Tumbled goldstone-like quartz pebble (Likely iron-stained quartz or jasper; exact identification requires testing) — mineral

Tumbled goldstone-like quartz pebble

Likely iron-stained quartz or jasper; exact identification requires testing

Brick fragment (Man-made material) (N/A (Fired clay)) — man-made

Brick fragment (Man-made material)

N/A (Fired clay)

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Goldstone (Brown/Gold variety) (Aventurine Glass (SiO2 with Copper inclusions)) — Synthetic/Man-made glass (often mistaken for a mineral)

Goldstone (Brown/Gold variety)

Aventurine Glass (SiO2 with Copper inclusions)

Synthetic/Man-made glass (often mistaken for a mineral)

Tumbled jasper (likely ocean/picture jasper) (Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions) — mineral

Tumbled jasper (likely ocean/picture jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions

Milky quartz pebble (Quartz (SiO₂), likely massive or microcrystalline quartz) — mineral

Milky quartz pebble

Quartz (SiO₂), likely massive or microcrystalline quartz

Black volcanic glass or basalt pendant (Likely basalt (fine-grained mafic rock), possibly obsidian (volcanic glass)) — igneous

Black volcanic glass or basalt pendant

Likely basalt (fine-grained mafic rock), possibly obsidian (volcanic glass)

Black tumbled stone, possibly obsidian (Undetermined; appearance may resemble obsidian (volcanic glass, SiO₂-rich)) — mineral

Black tumbled stone, possibly obsidian

Undetermined; appearance may resemble obsidian (volcanic glass, SiO₂-rich)

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

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

Tumbled white quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Likely gold-colored metal ring with a possible gemstone (Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting) — mineral

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Cullet Glass (Industrial Slag Glass) (Amorphous Silica (SiO2) with metallic oxide impurities) — Man-made byproduct (often mistaken for Obsidian or Emerald)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Man-made byproduct (often mistaken for Obsidian or Emerald)

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

Asphalt Pavement (with aggregate) (Asphalt concrete) — man-made composite

Asphalt Pavement (with aggregate)

Asphalt concrete

man-made composite

Engineered Quartz (Engineered Stone (primarily SiO2)) — metamorphic

Engineered Quartz

Engineered Stone (primarily SiO2)

Textile (Upholstery Fabric) (Woven Polyethylene/Polyester or Cotton Blend) — Synthetic or Natural Fiber

Textile (Upholstery Fabric)

Woven Polyethylene/Polyester or Cotton Blend

Synthetic or Natural Fiber

Not a geological specimen (N/A (man-made object)) — N/A

Not a geological specimen

N/A (man-made object)

Carved yellow stone butterfly (Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone) — mineral

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Tumbled dark stone, possibly basalt (Basalt; fine-grained mafic rock composed mainly of plagioclase and pyroxene, with possible olivine) — igneous

Tumbled dark stone, possibly basalt

Basalt; fine-grained mafic rock composed mainly of plagioclase and pyroxene, with possible olivine

Cobalt Glass Slug (Cullet) (Man-made Silicate Glass with Cobalt Oxide (CoO)) — mineraloid

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)

Quartz-rich rock fragment, likely milky quartz (Quartz (silicon dioxide, SiO₂), possibly an iron-stained quartz vein fragment) — mineral

Quartz-rich rock fragment, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly an iron-stained quartz vein fragment

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

Limestone with Calcite Crystals (Sedimentary Rock containing Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crystals

Sedimentary Rock containing Calcium Carbonate (CaCO3)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike) (Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)) — Synthetic (Ceramic)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Synthetic (Ceramic)

Faceted citrine-colored gemstone (likely synthetic/display stone) (Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation) — gemstone

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

Colorless faceted gemstone, likely cubic zirconia (Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond) — gemstone

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond