Blue glassy fragment among beach gravel
Likely cobalt-blue man-made glass; not a natural mineral specimen
mineral
Category
Man Made Object (Simulant)
Browse man made object (simulant) specimens identified by the Rock Identifier community.
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Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Mineraloid / Synthetic Glass
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Dark green cabochon gemstone ring
Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem
gemstone
Serpentinite
Serpentine group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Blue Zircon
Zircon (Zirconium Silicate - ZrSiO4)
gemstone
Cubic Zirconia
Zirconium dioxide (ZrO2)
mineralogical simulant / gemstone
Cubic Zirconia
Zirconium dioxide (ZrO2)
mineral
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Cubic Zirconia
Zirconium dioxide (ZrO2)
mineral
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Green sea glass (likely slag glass or bottle glass)
Man-made soda-lime silicate glass; not a naturally occurring mineral
mineral
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
mineraloid / anthropogenic (man-made origin)
Serpentine
Antigorite/Chrysotile/Lizardite mixture (Mg,Fe)3Si2O5(OH)4
metamorphic
Cubic Zirconia (as used in jewelry setting)
Zirconium dioxide (ZrO2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Cubic Zirconia (CZ) in Gold-Plated Setting
Cubic Zirconium Dioxide (ZrO2)
mineral
Small dark pebble, likely basalt or iron-rich rock
Uncertain from image; possibly fine-grained basalt (mafic silicate rock)
igneous
Diamond (or Diamond Simulant)
Carbon (C) if diamond, various if simulant
gemstone
Chert (likely flint)
Microcrystalline quartz, SiO₂
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
mineral
Goldstone (aventurine glass)
Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)
mineral
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
gemstone
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Faceted transparent gemstone, likely glass or cubic zirconia
Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation
gemstone
Cubic Zirconia (as a jewelry specimen)
Zirconium dioxide (ZrO2)
mineral
Diamond (or Diamond Simulant)
Carbon (C) or Zirconium dioxide (ZrO2) for CZ
gemstone
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
gemstone
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
Anthropogenic (Man-made artifact)
Black tourmaline (likely schorl)
Schorl, NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Diamond (or Diamond Simulant)
Carbon (C) - Native Element
mineral
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Polished brown stone, likely smoky quartz or jasper
Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing
mineral