Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Category
Man Made (Synthetic Rock)
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Learn about Man Made (Synthetic Rock) in the encyclopedia
View all →
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Diamond
Native Carbon (C)
gemstone
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Sandstone Concretion
Clastic Sedimentary Concretion (SiO2 with Iron Oxide)
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made vitreous material
gemstone
Sea Glass
Man-made silicate glass
sedimentary
Sea Glass
Man-made vitreous material
mineral
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
sedimentary
Blue Obsidian (Cullet Glass)
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
mineral
Sea Glass
Man-made silicate glass
gemstone
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary
Sea Glass
Amorphous silicon dioxide
mineral
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Crescent Pebble
Weathered Quartzite or Sandstone Fragment
sedimentary
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Small pebble, likely limestone
Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)
sedimentary
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Technogenic / Anthropogenic Pavement Material
Red cabochon gemstone ring (likely glass or synthetic stone)
Undetermined; the image does not establish a natural mineral identity
gemstone
Gem-set gold ring
Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring
gemstone
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
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
Diamond (or Simulant)
Carbon (C)
gemstone
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Dyed Agate / Painted Stone
Silicon Dioxide (SiO2) with artificial pigment
sedimentary (base), then artificial
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral