Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Category
Mineral (Man Enhanced)
Browse mineral (man enhanced) specimens identified by the Rock Identifier community.
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Diamond
Diamond (pure native carbon, C)
mineral
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
sedimentary
Dyed pink tumbled stone, possibly howlite or magnesite
Likely dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); the photo is insufficient for confirmation
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Aura Rose Quartz
SiO2 (Silicon Dioxide with Titanium/Gold coating)
mineral
Tumbled quartz pebble
Quartz, silicon dioxide (SiO₂), likely milky quartz
mineral
Polished pink chalcedony (likely pink agate/geode)
Microcrystalline quartz, SiO₂; chalcedony with iron-bearing inclusions and possible druzy quartz
mineral
Dyed Agate
Cryptocrystalline variety of Silica (SiO2)
gemstone
Goldstone
Aventurine glass
mineral (man-made glass)
Bornite
Bornite (Cu5FeS4)
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Quartz crystal (likely clear quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Turquoise (likely stabilized or simulated Howlite)
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Polished agate/jasper pebble
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining
mineral
Dyed Blue Agate Slice
Chalcedony (Silicon Dioxide, SiO2)
mineral
Smoky Quartz (Chlorite Inclusions)
Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation
mineral
Polished fossiliferous limestone
Bioclastic carbonate rock, primarily calcite (CaCO₃)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral
Polished dark granitoid pebble
Likely basalt or fine-grained gabbro; chiefly plagioclase and pyroxene, possibly magnetite
igneous
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Ocean Jasper Mushroom
Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)
mineral
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Polished/tumbled iron-rich jasper (likely brecciated jasper)
Jasper, microcrystalline quartz (SiO₂) colored chiefly by iron oxides/hydroxides
metamorphic
Citrine Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Topaz (Imperial/Golden Topaz)
Topaz - Al2SiO4(F,OH)2
gemstone