Rock Identifier

Category

Mineral (Man Made Glass, Not Natural)

Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Amethyst and Citrine (Ametrine Mix) (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst and Citrine (Ametrine Mix)

Silicon Dioxide (SiO2) with Fe3+ impurities

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Chert (Silicon dioxide (SiO2)) — Sedimentary

Chert

Silicon dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Prasiolite (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite

Silicon Dioxide (SiO2) with iron impurities

Chert (with Limestone matrix) (Silicon dioxide (SiO2)) — sedimentary

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper) (Chalcedony (SiO₂)) — Mineral (or mineraloid if microcrystalline)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Mineral (or mineraloid if microcrystalline)

Sandstone (Sandstone (Sedimentary rock composed of silicate grains)) — sedimentary

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Citrine (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine

Silicon Dioxide (SiO2) with iron impurities

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

Diamond (or Cubic Zirconia)

Carbon (C) / Cubic Zirconium Dioxide (ZrO2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Obsidian (Black) (Obsidian (High-silica volcanic glass)) — igneous

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Sea Glass (Cobalt Blue) (Amorphous Silica (Glass with Cobalt additives)) — Anthropogenic specimen (man-made)

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Anthropogenic specimen (man-made)

Chert / Flint (Chert (varieties include Flint)) — Sedimentary

Chert / Flint

Chert (varieties include Flint)

Amethyst (Amethyst (Silicon Dioxide - SiO2 with Iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Yellow Quartz (Citrinated Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)

Blue Sea Glass (Amorphous Silica (Anthropogenic glass)) — not a rock (man-made origin)

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

not a rock (man-made origin)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Chert) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Smoky Quartz (Smoky Quartz (SiO2)) — Mineral

Smoky Quartz

Smoky Quartz (SiO2)

Chert (Chalcedony/Agate variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Green Fluorite (likely synthetic or heat-treated for jewelry) (Calcium Fluoride (CaF2)) — mineral

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Raw Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Raw Citrine

Citrine (Silicon Dioxide, SiO2)

Citrine (likely Heat-Treated) (Quartz (Silicon Dioxide, SiO2)) — mineral

Citrine (likely Heat-Treated)

Quartz (Silicon Dioxide, SiO2)

Citrine (Citrine (Silicon Dioxide - SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide - SiO2)

Pearl (Aragonite / Calcium Carbonate (CaCO3)) — mineraloid

Pearl

Aragonite / Calcium Carbonate (CaCO3)

Obsidian (Obsidian (principally SiO2 - Silicon Dioxide)) — igneous

Obsidian

Obsidian (principally SiO2 - Silicon Dioxide)

Sandstone (Quartz Arenite) (Sandstone (dominated by SiO2 quartz grains)) — sedimentary

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Obsidian (Obsidian (Volcanic Glass) SiO2 (70% or more)) — igneous

Obsidian

Obsidian (Volcanic Glass) SiO2 (70% or more)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Raw Citrine (Citrine (Silicon Dioxide - SiO2)) — mineral

Raw Citrine

Citrine (Silicon Dioxide - SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Asphalt Concrete (Bituminous Concrete / Asphaltic Composite) — not a natural rock (man-made composite)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

not a natural rock (man-made composite)

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

Citrine

Citrine (Silicon Dioxide, SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)