Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Man Made Composite) in the encyclopedia
View all →
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
mineral
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
igneous/metamorphic (hydrothermal)
White quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Opalite
Synthetic opalescent glass
glass
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Goldstone
Aventurine glass
mineral (man-made glass)
Opalite
Synthetic Opalised Glass
glass
Bismuth
Bismuth (Bi)
mineral
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Obsidian (Blue)
Volcanic Glass (SiO2)
igneous
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Mystic Topaz
Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating
mineral
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral
Opalite
Synthetic Opalised Glass
mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Blue Goldstone
Aventurine Glass
Man-made glass (often grouped with minerals in lapidary)
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone