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

Sea Glass (Amorphous silicon dioxide (Man-made glass weathered by nature)) — mineral

Sea Glass

Amorphous silicon dioxide (Man-made glass weathered by nature)

Mahogany Obsidian Arrowhead (Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)) — igneous

Mahogany Obsidian Arrowhead

Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Common Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Common Opal

Hydrated amorphous silica (SiO2·nH2O)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Shungite (Carbonaceous rock (primarily amorphous carbon)) — Mineraloid

Shungite

Carbonaceous rock (primarily amorphous carbon)

Precious Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Precious Opal

Hydrated amorphous silica (SiO2·nH2O)

Sea Glass (Amorphous Silica (Anthropogenic glass) - SiO2) — mineral

Sea Glass

Amorphous Silica (Anthropogenic glass) - SiO2

Ethiopian Opal (Welo Opal) (Hydrated Amorphous Silica (SiO2·nH2O)) — mineraloid

Ethiopian Opal (Welo Opal)

Hydrated Amorphous Silica (SiO2·nH2O)

Slag (Industrial Glass Slag) (Amorphous Silica / Ferro-silicate Slag) — mineraloid / anthropogenic

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

mineraloid / anthropogenic

Black Obsidian (Obsidian, volcanic glass (Amorphous SiO₂)) — Igneous Rock

Black Obsidian

Obsidian, volcanic glass (Amorphous SiO₂)

Polished black stone, likely obsidian (Volcanic glass; predominantly silica-rich rhyolitic glass (SiO₂), identification uncertain from the image) — igneous

Polished black stone, likely obsidian

Volcanic glass; predominantly silica-rich rhyolitic glass (SiO₂), identification uncertain from the image

Amber (Fossilized tree resin (C10H16O)) — gemstone

Amber

Fossilized tree resin (C10H16O)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Leopard Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Leopard Jasper

Microcrystalline Quartz (SiO2)

Limonite Concretion (Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O) — mineral

Limonite Concretion

Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O

Black Obsidian (Volcanic Glass (SiO2 with impurities)) — igneous

Black Obsidian

Volcanic Glass (SiO2 with impurities)

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

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Moqui Marble (Hematite-Goethite Concretion (Fe2O3 / FeO(OH))) — mineral

Moqui Marble

Hematite-Goethite Concretion (Fe2O3 / FeO(OH))

Fulgurite (Lechatelierite (vitreous silica)) — mineral

Fulgurite

Lechatelierite (vitreous silica)

Bituminous Coal (Coal (Sedimentary Rock)) — sedimentary

Bituminous Coal

Coal (Sedimentary Rock)

Jet (Lignite coal variant (hydrocarbon polymer)) — sedimentary

Jet

Lignite coal variant (hydrocarbon polymer)

Fossilized Gastropod Steinkern (Class Gastropoda internal mold) — fossil

Fossilized Gastropod Steinkern

Class Gastropoda internal mold

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

Limonite (Iron Ore)

FeO(OH)·nH2O

Chert with Limestone (Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix) — sedimentary

Chert with Limestone

Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix

Opalite (Synthetic Opalized Glass) — gemstone

Opalite

Synthetic Opalized Glass

Blue Goldstone (Synthetic glass with cobalt and copper inclusions) — man-made glass

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Anthracite Coal (Anthracite (Highly Metamorphosed Coal)) — sedimentary

Anthracite Coal

Anthracite (Highly Metamorphosed Coal)

Amber (Succinite (Fossilized Resin)) — gemstone

Amber

Succinite (Fossilized Resin)

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

Chrysocolla

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

Limonite (Hydrous ferric oxides (FeO(OH)·nH2O)) — sedimentary

Limonite

Hydrous ferric oxides (FeO(OH)·nH2O)

Yellow Ochre (Limonite) (Limonite (FeO(OH)qnH2O)) — sedimentary

Yellow Ochre (Limonite)

Limonite (FeO(OH)qnH2O)

Ambergris (Marine Coprolite/Subfossil) (Marine organic coprolite / Ambergris (Physeter macrocephalus metabolite)) — fossil

Ambergris (Marine Coprolite/Subfossil)

Marine organic coprolite / Ambergris (Physeter macrocephalus metabolite)

Amber (Copal) (Succinite (fossilized resin)) — mineral

Amber (Copal)

Succinite (fossilized resin)

Anthracite Coal (Anthracite) — sedimentary

Anthracite Coal

Anthracite

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

Black Obsidian

Obsidian (Volcanic Glass, SiO2+)

Goldstone (Brown/Gold) (Aventurine Glass (Man-made glass with Copper inclusions)) — gemstone

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Ironstone (Limonite/Goethite Concretion) (Ferruginous Sedimentary Rock (composed of Goethite FeO(OH) and Limonite)) — sedimentary

Ironstone (Limonite/Goethite Concretion)

Ferruginous Sedimentary Rock (composed of Goethite FeO(OH) and Limonite)

Chert / Fossilized Burrow Cast (Microcrystalline Quartz (SiO2) with Trace Carbonates) — sedimentary

Chert / Fossilized Burrow Cast

Microcrystalline Quartz (SiO2) with Trace Carbonates

Yellow Ochre / Limonite (FeO(OH)·nH2O (Hydrated Iron Oxide Mix)) — mineral

Yellow Ochre / Limonite

FeO(OH)·nH2O (Hydrated Iron Oxide Mix)