Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Category
Man Made Silicate (Anthropogenic Glass)
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
Learn about Man Made Silicate (Anthropogenic Glass) in the encyclopedia
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Cobalt Blue Slag Glass
Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives
mineraloid
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Opalite
Synthetic Opalite (Man-made glass)
mineral
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety
mineral
Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid
Opalite
Synthetic Opalised Glass
mineral
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalized Glass
gemstone
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Opalite
Synthetic Glass (Simulated Opal)
mineral
Opalite (a synthetic glass)
Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant
Mineral Simulant (Synthetic Glass)
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
mineral
Goldstone (Brown)
Aventurine Glass (Silicon Dioxide infused with Copper crystals)
mineraloid (man-made glass)
Slag (Industrial Glass)
Anthropogenic Vitreous Slag (Post-industrial byproduct)
igneous
Likely tumbled or cut quartz/chalcedony fragment
Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz
mineral
Mystic Topaz
Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating
mineral
Diamond
Native Carbon (C)
gemstone
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Blue Goldstone
Aventurine Glass
man-made glass
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Not a geological specimen
N/A (man-made object)
N/A
Goldstone
Aventurine glass
mineral (man-made glass)
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Not a rock, mineral, or geological specimen
N/A
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic