Pumice
Pumice (Amorphous volcanic glass)
igneous
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
Learn about Amorphous Solid in the encyclopedia
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Pumice
Pumice (Amorphous volcanic glass)
igneous
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Amber
Fossilized tree resin (Amorphous)
gemstone
Apache Tear (Obsidian)
Volcanic Glass (Amorphous SiO2)
igneous
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Mineraloid
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Generic Rock Fragment
Rock Fragment
sedimentary
Flint / Chert
Cryptocrystalline quartz (SiO2)
sedimentary
Bumblebee Jasper
Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)
sedimentary
Limonite Boxwork / Iron Ore Concretion
FeO(OH)qnH2O (Hydrated iron oxide)
sedimentary
Limonite (Ochreous Sandstone)
Hydrous ferric oxides (FeO(OH)qnH2O)
sedimentary
Amber (Copal)
Fossilized Tree Resin (C10H16O)
mineral
Obsidian
Obsidian (Volcanic Glass, complex silicate)
igneous
Libyan Desert Glass
Impactite (vitreous silica), SiO2
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Gold Sheen Obsidian
Obsidian (volcanic glass with SiO2 + gas inclusions)
igneous
Amber / Copal
Organic resin, C10H16O
mineral
Yellow Ochre / Limonite
Limonite (inter-mixed iron oxides and hydroxides, primarily FeO(OH)·nH2O)
mineral
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Yellow Ochre / Limonite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Mineral
Obsidian
Volcanic glass (SiO2 - Silicon dioxide predominant composition)
Igneous
Black Obsidian
Volcanic glass (Amorphous silicates)
igneous
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Pumice
Vesicular Rhyolite (Amorphous glass)
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Apache Tear (Obsidian)
Obsidian (Si02 - Amorphous Silicate)
igneous
Obsidian (in jewelry setting)
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Amorphous volcanic glass (SiO2)
igneous
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
mineraloid
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
Igneous