Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Learn about Man Made Glass (Often Grouped With Minerals In Lapidary) in the encyclopedia
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Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
White quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Sea Glass
Silicon dioxide (mostly)
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Opalite
Man-made Glass (Synthetic Opalized Glass)
gemstone
Tumbled jasper, likely red/brown jasper
Microcrystalline quartz (chalcedony), mainly SiO₂, colored by iron oxides
mineral
Opalite
Synthetic Glass (Simulated Opal)
mineral
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Green glass-like mineral specimen, likely fluorite
Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass
mineral
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Sea Glass
Man-made silicate glass
sedimentary
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Sea Glass
Man-made vitreous material
mineral
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Botryoidal chalcedony (likely agate/jasper variety)
Microcrystalline quartz, SiO₂
mineral
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Man-made Glass (Tumbled/Shaped)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Mineraloid (synthetic)
Not a rock, mineral, or geological specimen
N/A
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic