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

Obsidian (Obsidian (principally SiO2 + MgO, Fe3O4)) — igneous

Obsidian

Obsidian (principally SiO2 + MgO, Fe3O4)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Porcelain (Stoneware Ceramic) (Mullite / Silica-glass composite (Al6Si2O13)) — metamorphic (man-made)

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

metamorphic (man-made)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Ambergris (Ambrein (C30H52O)) — mineraloid / organic geological substance

Ambergris

Ambrein (C30H52O)

mineraloid / organic geological substance

Common Opal (Hydrated silica (SiO2 " nH2O)) — mineral

Common Opal

Hydrated silica (SiO2 " nH2O)

Fossilized Shell in Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossilized Shell in Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Iron Gossan (Limonite/Goethite) (Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones) — sedimentary

Iron Gossan (Limonite/Goethite)

Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones

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

Precious Opal

Hydrated Silica (SiO2·nH2O)

Chakra Stone Bracelet (mixed gemstones) (Multi-mineral/Gemstone assembly (primarily Quartz variety beads)) — mineral

Chakra Stone Bracelet (mixed gemstones)

Multi-mineral/Gemstone assembly (primarily Quartz variety beads)

Ironstone with Limonite/Goethite coating (Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)) — sedimentary

Ironstone with Limonite/Goethite coating

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)

Slag (Industrial By-product) (Anthropogenic Vitreous Silica/Iron Silicate) — mineral

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

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

Chrysocolla

Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O

Pumice (Vesicular volcanic glass (Amorphous silica mixed with various oxides)) — igneous

Pumice

Vesicular volcanic glass (Amorphous silica mixed with various oxides)

Obsidian (Apache Tear) (Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)) — igneous

Obsidian (Apache Tear)

Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)

Obsidian (Volcanic glass (SiO2-rich amorphous silicate)) — igneous

Obsidian

Volcanic glass (SiO2-rich amorphous silicate)

Sea Glass (Turquoise/Aqua) (Amorphous Silica (SiO2) with transition metal dopants) — Anthropogenic (Man-made material processed by nature)

Sea Glass (Turquoise/Aqua)

Amorphous Silica (SiO2) with transition metal dopants

Anthropogenic (Man-made material processed by nature)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Anthracite Coal (Carbon (with trace impurities)) — sedimentary

Anthracite Coal

Carbon (with trace impurities)

Pumice (Pumice) — igneous

Pumice

Pumice

Coal (Anthracite / Bituminous Coal) — sedimentary

Coal

Anthracite / Bituminous Coal

Obsidian (Polished Point/Wand) (Volcanic Glass (SiO2 with impurities)) — igneous

Obsidian (Polished Point/Wand)

Volcanic Glass (SiO2 with impurities)

Chert (Microcrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline quartz (SiO2)

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

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Dinosaur Fossil Tooth (Vertebrate Fossilized Tooth) — fossil

Dinosaur Fossil Tooth

Vertebrate Fossilized Tooth

Chert Nodule in Limestone (Sedimentary rock comprising microcrystalline quartz (chert) and calcium carbonate (limestone)) — sedimentary

Chert Nodule in Limestone

Sedimentary rock comprising microcrystalline quartz (chert) and calcium carbonate (limestone)

Sea Glass (Man-made silicate glass) — gemstone

Sea Glass

Man-made silicate glass

Snowflake Obsidian (Volcanic glass containing Spherulites of Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulites of Cristobalite (SiO2)

Amber (Succinite (Fossilized Resin)) — gemstone

Amber

Succinite (Fossilized Resin)

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

Limonite (Iron Ore)

FeO(OH)·nH2O

Obsidian (Volcanic Glass (Rich in SiO2)) — igneous

Obsidian

Volcanic Glass (Rich in SiO2)

Snowflake Obsidian (Spherulitic Obsidian (Volcanic glass containing Cristobalite)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (Volcanic glass containing Cristobalite)

Baltic Amber (Succinite (Fossilized Tree Resin)) — fossil

Baltic Amber

Succinite (Fossilized Tree Resin)

Mahogany Obsidian (Obsidian (volcanic glass with hematite/magnetite inclusions)) — igneous

Mahogany Obsidian

Obsidian (volcanic glass with hematite/magnetite inclusions)

Fossilized Shark Teeth in Matrix (Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix) — fossil

Fossilized Shark Teeth in Matrix

Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix

Amber (Rough) (Succinite (Resinite)) — gemstone

Amber (Rough)

Succinite (Resinite)

Coal (Anthracite or Bituminous Coal) — sedimentary

Coal

Anthracite or Bituminous Coal

Green Opal or Yellow Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Green Opal or Yellow Opal

Hydrated Silica (SiO2·nH2O)

Obsidian Arrowhead (Obsidian (Volcanic Glass)) — igneous

Obsidian Arrowhead

Obsidian (Volcanic Glass)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin