Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Category
Man Made Rock Like Material
Browse man made rock like material specimens identified by the Rock Identifier community.
Learn about Man Made Rock Like Material in the encyclopedia
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Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂), likely milky quartz
mineral
Likely tumbled or cut quartz/chalcedony fragment
Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz
mineral
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
igneous
Blue opalite glass (likely man-made)
Opalite glass; a silica-based amorphous glass, not natural opal
mineral
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Opalite
Synthetic Glass (Simulated Opal)
mineral
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Slag
Metallurgical Slag
igneous
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Opalite (likely man-made opalescent glass)
Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)
mineral
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Polished brown jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
gemstone
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Opalite (likely imitation opal glass)
Man-made opalescent glass; not a natural mineral (often sold as opalite)
mineral
Opalite
Synthetic Opalised Glass
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Obsidian (Blue)
Volcanic Glass (SiO2)
igneous
Opalite-style pendant (likely synthetic glass, not natural opal)
Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)
gemstone
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material
Clear quartz tumbled stone
Quartz (silicon dioxide, SiO₂)
mineral
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Synthetic/Anthropogenic Mineraloid
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary