Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Synthetic (Man-made Glass)
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
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Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Sea Glass (Cobalt Blue)
Amorphous Silica (Glass with Cobalt additives)
Anthropogenic specimen (man-made)
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
sedimentary
Amethyst (with Pyrite and other minerals)
Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (Vitreous volcanic rock)
igneous
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
mineral
Tektite
Impactite (Natural Silicate Glass)
meteorite
Strawberry Quartz (or Pink Aventurine)
Quartz with Hematite/Goethite inclusions (SiO2)
mineral
Faceted colorless gemstone, likely quartz or glass imitation
Most likely quartz (SiO₂), though the strong glare and visible facet pattern could indicate cubic zirconia or lead glass
gemstone
Tumbled brown chalcedony or jasper
Microcrystalline quartz, SiO₂; possibly iron-bearing jasper
mineral
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Tumbled purple chalcedony or low-grade amethyst bead bracelet
Chalcedony (microcrystalline SiO₂), possibly quartz/amethyst; composition is SiO₂
mineral
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Raw quartz crystal pendant
Quartz (silicon dioxide, SiO₂), likely milky or cloudy quartz
mineral
Sea Glass
Amorphous Silica (Glass) SiO2
Mineraloid (Man-made origin)
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Amethyst
Silicon Dioxide (SiO2)
mineral
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Diamond
Native Carbon (C)
mineral
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Mixed beach-stone and tumbled-glass collection
Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper
mineral
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Tumbled gray chalcedony (likely agate or quartzite)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Polished garnet bead bracelet
Garnet group, likely almandine–pyrope solid solution; commonly approximated as Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃
gemstone
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Green Aura Quartz
Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)
mineral
Polished black obsidian
Volcanic glass; primarily rhyolitic SiO₂, with minor iron, magnesium, and other trace elements
igneous
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue glassy cabochon, likely blue quartz or synthetic glass
Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive
gemstone
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Diamond (as set in a gold ring)
Carbon (C)
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Arenite
sedimentary
Chalcedony with iron-oxide staining
Microcrystalline quartz (SiO₂), likely chalcedony or chert with limonite/goethite staining
mineral
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)