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

Common Opal (Hydrated silica (SiO2 "n"H2O)) — mineral

Common Opal

Hydrated silica (SiO2 "n"H2O)

Ironstone Concretion (Ferruginous Siltstone/Ironstone (Fe2O3)) — sedimentary

Ironstone Concretion

Ferruginous Siltstone/Ironstone (Fe2O3)

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

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Geode (Crystalline Quartz in Sedimentary Matrix (SiO2)) — sedimentary

Geode

Crystalline Quartz in Sedimentary Matrix (SiO2)

Black Obsidian (Obsidian (Volcanic Glass, rich in SiO2)) — igneous

Black Obsidian

Obsidian (Volcanic Glass, rich in SiO2)

Chalcopyrite in Quartz matrix (Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)) — mineral

Chalcopyrite in Quartz matrix

Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)

Sandstone (lithic/quartz variant) (Clastic sedimentary rock (SiO2 predominant)) — sedimentary

Sandstone (lithic/quartz variant)

Clastic sedimentary rock (SiO2 predominant)

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

Limonite (Iron Ore)

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

Baltic Amber (Raw) (Succinite) — fossil

Baltic Amber (Raw)

Succinite

Mahogany Obsidian (Volcanic Glass with Hematite inclusions) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite inclusions

Anthracite Coal (Anthracite (Carbon)) — sedimentary

Anthracite Coal

Anthracite (Carbon)

Coal (Bituminous or Anthracite) (Organogenic Sedimentary Rock (Carbon)) — sedimentary

Coal (Bituminous or Anthracite)

Organogenic Sedimentary Rock (Carbon)

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Siltstone (Siltstone (composed of clastic quartz and feldspar grains)) — sedimentary

Siltstone

Siltstone (composed of clastic quartz and feldspar grains)

Coquina or Coral Fossil (Biogenic Limestone (Calcite/Aragonite)) — sedimentary

Coquina or Coral Fossil

Biogenic Limestone (Calcite/Aragonite)

Anthracite Coal (Anthracite (Carbon)) — sedimentary

Anthracite Coal

Anthracite (Carbon)

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

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

Tektite (Indochinite)

Tektite (High-silica natural glass)

Chrysocolla (Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)) — mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)

Obsidian with Slate/Tuff (Volcanic glass (SiO2) with associated pyroclastic rock) — igneous

Obsidian with Slate/Tuff

Volcanic glass (SiO2) with associated pyroclastic rock

Obsidian (Obsidian) — Igneous

Obsidian

Obsidian

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Pumice (Pumice (a frothy volcanic glass)) — igneous

Pumice

Pumice (a frothy volcanic glass)

Obsidian (Volcanic Glass (SiO2 - Silicon Dioxide with impurities)) — Igneous

Obsidian

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Amber (Succinates (fossilized tree resin), approximately C10H16O) — organic gemstone

Amber

Succinates (fossilized tree resin), approximately C10H16O

organic gemstone

Synthetic Resin Charm (Seal Shape) (Polymer Resin with plastic glitter / Polyethylene terephthalate glitters) — Synthetic material (Not a rock or mineral)

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Synthetic material (Not a rock or mineral)

Pearl (Calcium carbonate (CaCO3) - mainly Aragonite) — mineral

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite

Concrete Rubble with Aggregate (Hardened Portland Cement Paste with Coarse Aggregate) — Anthropogenic (Man-made)

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Anthropogenic (Man-made)

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Amber and Citrine Quartz (Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)) — mineral

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Limonite / Ironstone Nodule (Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O) — mineral

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Ironstone concretion / Limonitic Sandstone (Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)) — sedimentary

Ironstone concretion / Limonitic Sandstone

Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)

Moqui Marble (Ironstone Concretion (Limonite/Hematite over Sandstone)) — sedimentary

Moqui Marble

Ironstone Concretion (Limonite/Hematite over Sandstone)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Limonite Concretion (Goethite/Limonite (FeO(OH)·nH2O)) — sedimentary

Limonite Concretion

Goethite/Limonite (FeO(OH)·nH2O)

Amber (Succinite (fossilized resin)) — Organic Mineraloid

Amber

Succinite (fossilized resin)

Organic Mineraloid

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Amber (Succinite) — Organic (Mineraloid)

Amber

Succinite

Organic (Mineraloid)