Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Category
Mineraloid (Man Made Glass)
Browse mineraloid (man made glass) specimens identified by the Rock Identifier community.
Learn about Mineraloid (Man Made Glass) in the encyclopedia
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Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Quartz crystal fragment (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Opalite
Synthetic Opalised Glass
mineral
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Opalite
Synthetic Opalized Glass
gemstone
Not a geological specimen
N/A (man-made object)
N/A
Blue Goldstone
Man-made glass with cobalt and metal flecks
man-made glass
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety
mineral
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
sedimentary
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
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)
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Blue Goldstone
Aventurine Glass
man-made glass
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
mineral
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Diamond
Native Carbon (C)
gemstone
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
mineral
Sea Glass
Man-made silicate glass weathering product
sedimentary
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Goldstone
Aventurine glass
mineral (man-made glass)
Opalite
Synthetic Glass (Simulated Opal)
mineral
Opalite glass sphere (likely synthetic imitation)
Man-made opalescent glass; not natural opal
mineral
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Tumbled white chalcedony (likely milky quartz)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral