Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Category
Not A Rock (Man Made Origin)
Browse not a rock (man made origin) specimens identified by the Rock Identifier community.
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Slag (Anthropogenic Glass/Iron byproduct)
Ferro-silicate Slag
Anthropogenic (Man-made)
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Fluorite Tower
Calcium Fluoride (CaF2)
mineral
Fluorite (Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
igneous
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
mineral
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineral
Diamond
Carbon (C)
mineral
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
sedimentary
Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
not a rock (man-made polymer)
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Dolerite (Diabase)
Dolerite / Diabase
igneous
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
mineral
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Diorite
Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica
mineral
Granite
Phaneritic plutonic rock (SiO2 typically >69%)
igneous
Yellow Quartzite (Citrine-colored Quartz)
Silicon Dioxide (SiO2)
metamorphic
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Cinnabar
Mercury(II) sulfide (HgS)
mineral
Amber
Succinite (fossilized resin)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (often called Rainbow Fluorite or Purple-Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Anthracite Coal
Anthracite (a variety of coal, predominantly carbon)
Sedimentary Rock (Metamorphosed)
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6
mineral
Amber
Succinite
Organic Mineraloid
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
Sedimentary
Note: Item is not a geological specimen
n/a
none