Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Category
Man Made Metamorphic Style Composite
Browse man made metamorphic style composite specimens identified by the Rock Identifier community.
Learn about Man Made Metamorphic Style Composite in the encyclopedia
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Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
mineral
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Red Sandstone or Brick Fragment
Arenite (if sandstone)
sedimentary
Polished labradorite sphere
Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)
mineral
Polished labradorite pendant
Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Bismuth
Bismuth (Bi)
mineral
Connemara Marble
Calcitic Marble / Serpentinite composite
metamorphic
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Crescent Pebble
Weathered Quartzite or Sandstone Fragment
sedimentary
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Opalite
Synthetic Opalised Glass
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Dearest Ring (Gemstones)
Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Quartz with Chlorite inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals (hydrous magnesium iron alumino-silicate)
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
sedimentary
Mystic Topaz
Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating
mineral
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral