Rock Identifier

Category

Mineraloid (Synthetic)

Browse mineraloid (synthetic) specimens identified by the Rock Identifier community.

Learn about Mineraloid (Synthetic) in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Shungite

Zincite

Opalite

Lead Feldspar

Zircon

White Beryl

Polished black stone, likely black obsidian (Obsidian (volcanic glass), primarily rhyolitic silica glass) — igneous

Polished black stone, likely black obsidian

Obsidian (volcanic glass), primarily rhyolitic silica glass

Obsidian (Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)) — igneous

Obsidian

Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)

Obsidian (Volcanic glass (mainly SiO2 with inclusions)) — igneous

Obsidian

Volcanic glass (mainly SiO2 with inclusions)

Mahogany Obsidian (Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Limonite (Iron Stone/Ocher) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Stone/Ocher)

Limonite (FeO(OH)·nH2O)

Obsidian (Amorphous volcanic glass (primarily SiO2)) — igneous

Obsidian

Amorphous volcanic glass (primarily SiO2)

Limonite/Goethite on Shale (Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock) — sedimentary

Limonite/Goethite on Shale

Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock

Snowflake Obsidian (Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions (70–75% SiO2)) — Igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions (70–75% SiO2)

Black Obsidian (Obsidian (Amorphous Silicon Dioxide)) — igneous

Black Obsidian

Obsidian (Amorphous Silicon Dioxide)

Snowflake Obsidian (Volcanic Glass with Cristobalite Inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite Inclusions

Plastic Building Toy (Lego-style piece) (Acrylonitrile Butadiene Styrene (ABS)) — not a rock/mineral

Plastic Building Toy (Lego-style piece)

Acrylonitrile Butadiene Styrene (ABS)

not a rock/mineral

Fulgurite (Lechatelierite) — mineraloid

Fulgurite

Lechatelierite

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated amorphous silica (SiO2·nH2O)

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated amorphous silica (SiO2·nH2O)

Amber (Tumbled/Polished) (Succinite (Fossilized Tree Resin)) — mineraloid

Amber (Tumbled/Polished)

Succinite (Fossilized Tree Resin)

Amber (Succinates) — mineraloid

Amber

Succinates

Pink Opal (Hydrated Silicon Dioxide (SiO2 · nH2O)) — mineraloid

Pink Opal

Hydrated Silicon Dioxide (SiO2 · nH2O)

Black Opal (Kalimaya) (Hydrated Silica (SiO2·nH2O)) — mineraloid

Black Opal (Kalimaya)

Hydrated Silica (SiO2·nH2O)

Opal (Hydrated silica (SiO2 · nH2O)) — mineraloid

Opal

Hydrated silica (SiO2 · nH2O)

Amber (Fossilized Tree Resin (Succinite)) — mineraloid

Amber

Fossilized Tree Resin (Succinite)

Amber (Copal) (Succinate (Fossilized Tree Resin)) — mineraloid

Amber (Copal)

Succinate (Fossilized Tree Resin)

Common Green Opal (Amorphous Hydrous Silica (SiO2·nH2O)) — mineraloid

Common Green Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

Tektite (Indochinite) (Tektite (High-silica natural glass)) — mineraloid

Tektite (Indochinite)

Tektite (High-silica natural glass)

Tektite (Indochinite) (Tektite (High-silica natural glass)) — mineraloid

Tektite (Indochinite)

Tektite (High-silica natural glass)

Bumblebee Jasper (Anhydrite-Aragonite mixture with Orpiment and Realgar) — mineraloid

Bumblebee Jasper

Anhydrite-Aragonite mixture with Orpiment and Realgar

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Precious Opal

Hydrated Silica (SiO2·nH2O)

Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

Amber (Succinates (C10H16O)) — mineraloid

Amber

Succinates (C10H16O)

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

Pearl

Aragonite / Calcium Carbonate (CaCO3)

Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

Pearl (Calcium Carbonate (Aragonite or Calcite) and Conchiolin) — Mineraloid

Pearl

Calcium Carbonate (Aragonite or Calcite) and Conchiolin

Amber (Succinate (Succinite for Baltic varieties)) — mineraloid

Amber

Succinate (Succinite for Baltic varieties)

Amber (Baltic) (Succinith (Fossilized Tree Resin)) — mineraloid

Amber (Baltic)

Succinith (Fossilized Tree Resin)

Amber (Succinite (organic fossilized resin)) — mineraloid

Amber

Succinite (organic fossilized resin)

Amber (Succinite (approximate formula C10H16O)) — mineraloid

Amber

Succinite (approximate formula C10H16O)

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)

Amber (Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)) — Mineraloid

Amber

Succinite (a specific common type) or Fossilized Tree Resin (C10H16O)