Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Category
Synthetic (Man Made Material Mimicking Natural Stone)
Browse synthetic (man made material mimicking natural stone) specimens identified by the Rock Identifier community.
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Diamond
Carbon (C)
mineral
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Parti Sapphire
Corundum (Al2O3)
mineral
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
mineral-based composite
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Rough Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond
gemstone
Citrine (Heat-treated Amethyst)
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond (in jewelry setting)
Carbon (C)
mineral
Dragon Vein Agate (Dyed/Treated)
Agate (SiO2)
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
White seed-bead gemstone strand, likely freshwater pearl or shell pearl
Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image
gemstone
Rough White Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks
Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock
sedimentary
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Diamond
Diamond (Pure Carbon, C)
mineral
Diamond (in Jewelry)
Carbon (C)
mineral
Diamond (as set in a gold ring)
Carbon (C)
mineral
Hematite Beads
Hematite (Fe2O3)
Mineral
Diamond
Native Carbon (C)
mineral
Polished blue-green glassy slag or coated mineral fragment
Most likely man-made colored glass/slag; exact composition cannot be determined visually
mineral
Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)
Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)
gemstone
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Raw Diamond
Carbon (C)
gemstone
Tumbled greenstone (likely serpentinite or green jasper)
Serpentinite, commonly dominated by serpentine-group minerals (Mg₃Si₂O₅(OH)₄); exact identification requires testing
metamorphic
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Faceted Clear Quartz or Diamond Simulant
Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic
gemstone
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Emerald
Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities
gemstone
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Cubic Zirconia and Synthetic Ruby Jewelry
Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)
gemstone
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
mineral
Diamond
Native Carbon (C)
gemstone
Agate (Polished Sphere)
Silicon Dioxide (SiO2)
mineral
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Blue Sapphire (likely lab-grown or treated)
Corundum (Aluminum Oxide, Al2O3)
gemstone
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral