Rock Identifier

Category

Amorphous Solid

Browse amorphous solid specimens identified by the Rock Identifier community.

Learn about Amorphous Solid in the encyclopedia

Tripolite

Rainbow Obsidian

Rainbow Obsidian

Oil Shale

Apache Tears

Grandite Garnet

Geyserite

Gold Sheen Obsidian

Black Obsidian

Diatomaceous Earth

Shungite

Flame Obsidian

Smoky Obsidian

Sandstone with Ironstone Concretion (Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))) — sedimentary

Sandstone with Ironstone Concretion

Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))

Opalite (Synthetic Opalised Glass) — mineraloid (synthetic)

Opalite

Synthetic Opalised Glass

mineraloid (synthetic)

Amber (Succinite (Carbon-based organic compound; approximate formula C10H16O)) — Mineraloid

Amber

Succinite (Carbon-based organic compound; approximate formula C10H16O)

Amber with Organic Inclusions (Succinite (fossilized resin)) — mineraloid

Amber with Organic Inclusions

Succinite (fossilized resin)

Amber (Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)) — Organic Mineraloid

Amber

Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)

Organic Mineraloid

Slag (Industrial Glass) (Anthropogenic Vitreous Slag (Post-industrial byproduct)) — igneous

Slag (Industrial Glass)

Anthropogenic Vitreous Slag (Post-industrial byproduct)

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

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Gold Sheen Obsidian (Volcanic Glass (SiO2 + H2O + Fe2O3)) — igneous

Gold Sheen Obsidian

Volcanic Glass (SiO2 + H2O + Fe2O3)

Obsidian (Volcanic Glass (SiO2, usually >70% silica content)) — Igneous

Obsidian

Volcanic Glass (SiO2, usually >70% silica content)

Ironstone (Limonitic Shale) (Ferruginous Siltstone / Goethite-rich Sedimentary Rock) — sedimentary

Ironstone (Limonitic Shale)

Ferruginous Siltstone / Goethite-rich Sedimentary Rock

Mahogany Obsidian (Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)

Obsidian (Volcanic glass (SiO2-rich extrusive igneous rock)) — igneous

Obsidian

Volcanic glass (SiO2-rich extrusive igneous rock)

Amber (Succinite (Formula: C10H16O)) — Mineraloid

Amber

Succinite (Formula: C10H16O)

Obsidian (Volcanic Glass (mostly SiO2)) — igneous

Obsidian

Volcanic Glass (mostly SiO2)

Mahogany Obsidian (Obsidian with Hematite inclusions (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Obsidian with Hematite inclusions (SiO2 + Fe2O3)

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

Snowflake Obsidian

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

Amber (Succinite (C10H16O)) — mineraloid

Amber

Succinite (C10H16O)

Chondrite Meteorite (Ordinary Chondrite (L or H type)) — igneous

Chondrite Meteorite

Ordinary Chondrite (L or H type)

Healer's Gold (Pyrite/Magnetite in Serpentine) (Magnetite (Fe3O4) and Pyrite (FeS2) in Lizardite/Antigorite [Mg3Si2O5(OH)4]) — metamorphic

Healer's Gold (Pyrite/Magnetite in Serpentine)

Magnetite (Fe3O4) and Pyrite (FeS2) in Lizardite/Antigorite [Mg3Si2O5(OH)4]

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

Precious Opal

Hydrated Silica (SiO2·nH2O)

Amber (Rough Baltics/Beach Specimen) (Succinicum (Organic Gemstone - Fossilized Resin)) — mineral

Amber (Rough Baltics/Beach Specimen)

Succinicum (Organic Gemstone - Fossilized Resin)

Ethiopian Fire Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Ethiopian Fire Opal

Hydrated Silica (SiO2·nH2O)

Opalite (Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)) — mineral

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Dendritic Opal (Common Opal) (Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions

Goldstone (Red/Brown) (Aventurine Glass (SiO2 with Copper inclusions)) — Mineral (Man-made glass)

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Mineral (Man-made glass)

Blue-green chrysocolla rough specimen (Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite) — mineral

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Witch Stone (Hag Stone) (Perforated Sedimentary Rock (Typically Sandstone or Limestone)) — sedimentary

Witch Stone (Hag Stone)

Perforated Sedimentary Rock (Typically Sandstone or Limestone)

Petrified Wood (Silicified wood (Quartz replacement of organic wood structure)) — fossil

Petrified Wood

Silicified wood (Quartz replacement of organic wood structure)

Limonite with Gold-bearing Quartz (Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O) — mineral

Limonite with Gold-bearing Quartz

Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Ironstone / Hematite Concretion (Iron oxide / Fe2O3) — sedimentary

Ironstone / Hematite Concretion

Iron oxide / Fe2O3

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Pumice (Pumice (Volcanic Glass Foam)) — igneous

Pumice

Pumice (Volcanic Glass Foam)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Limonite (FeO(OH)·n(H2O)) — mineral

Limonite

FeO(OH)·n(H2O)

Limonite (FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)) — mineral

Limonite

FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Amber (Fossilized Tree Resin (Organic Polymer)) — gemstone

Amber

Fossilized Tree Resin (Organic Polymer)

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

Obsidian (Obsidian) — igneous

Obsidian

Obsidian