Pumice
Pumice (Amorphous volcanic glass)
igneous
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
igneous
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Tektite (Indochinite)
Tektite (Amorphous Meteoritic Glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Slag Glass
Amorphous Silica / Glass Slag
industrial byproduct (anthropogenic rock-like material)
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
igneous
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Cobalt Blue Sea Glass
Amorphous Silica Glass (SiO2 + CoO)
mineraloid / anthropogenic material
Fire Opal in Host Rock
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Tumbled Stone
Silicon dioxide / Various silicates
mineral
Geode / Fossilized Gastropod or Shell Cast
Silicon dioxide (Quartz) replacement / fossil mold
sedimentary
Fulgurite
Lechatelierite (Silica Glass)
mineral
Limonite (Ironstone) pseudomorph
Limonite (Hydrous ferric oxide), FeO(OH)·nH2O
mineral
Amber (Copal)
Succiniferous Resin
mineraloid
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Amber (Copal)
Fossilized Tree Resin
mineraloid
Amber and Tumbled Stones
Fossilized Tree Resin (Succinite)
fossil
Amber
Succiniferous fossil resin (C10H16O)
fossil
Amber
Fossilized tree resin
gemstone
Amber
Succinate (Fossilized Resin)
mineral
Snowflake Obsidian
Volcanic Glass with Spherulitic Cristobalite (SiO2)
igneous
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Lignite (Brown Coal)
Lignite (C189H155O6N3S)
sedimentary
Coquina (Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Baroque Pearl
Biogenic Calcium Carbonate (Aragonite/Conchiolin)
mineral
Amber / Copal
Succinite (fossilized tree resin)
mineraloid
Chert with Crinoid Fossil Impression
Microcrystalline Quartz (SiO2) with Crinoidea fossil impression
sedimentary
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Brachiopod Fossil
Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)
sedimentary
Amber
Succinite
Organic Mineral
Amber
Amber (C10H16O)
mineral