Sandstone Concretion
Clastic Sedimentary Concretion (SiO2 with Iron Oxide)
sedimentary
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.
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Tumbled jasper, likely ocean or brecciated jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions
sedimentary
Sea Glass
Man-made vitreous material
gemstone
Goldstone
Man-made glass infused with metallic copper
gemstone
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Sea Glass
Man-made silicate glass weathering product
sedimentary
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary
Concrete rubble
Anthropogenic conglomerate
sedimentary
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)
Likely tumbled or cut quartz/chalcedony fragment
Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz
mineral
Concrete fragment or Conglomerate
Artificial Conglomerate (Concrete) or Natural Conglomerate
sedimentary
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Blue opalite glass (likely man-made)
Opalite glass; a silica-based amorphous glass, not natural opal
mineral
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
not a natural rock
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Sandstone (with Liesegang rings or joints)
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)
sedimentary
Blue Sandstone
Man-made glass with cobalt and copper inclusions
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Yellow chalcedony (likely polished/tumbled pieces)
Microcrystalline quartz, SiO₂; commonly called yellow jasper or silicified limestone depending on exact texture
mineral
Clear quartz crystal (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Polished obsidian
Volcanic glass; predominantly rhyolitic SiO₂
igneous
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
White quartz pebble or chip
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Unidentified translucent crystal/mineral fragment
Likely quartz (SiO₂), but visual identification is uncertain
mineral
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Green sea glass (likely bottle glass)
Man-made soda–lime silicate glass; not a natural mineral
mineral
Tumbled brown jasper (probable)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities
mineral
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
sedimentary
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Combined Minerals / Metaphysical stones
Goldstone
Man-made glass containing cuprous oxide
gemstone
Slag (Industrial Glass/Glassy Rock)
Anthropogenic Vitreous Material
igneous
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)