Yellow Chalcedony (Yellow Agate)
Silicon Dioxide (SiO2)
gemstone
Category
Man Made Object (Ring)
Browse man made object (ring) specimens identified by the Rock Identifier community.
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Chert (likely flint)
Microcrystalline quartz, SiO₂
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Heliotrope (Bloodstone)
Chalcedony quartz variety (SiO2) with hematite or jasper inclusions
mineral
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
mineral
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Red carnelian (red chalcedony)
Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides
gemstone
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
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
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Smoky Quartz (Faceted)
Silicon Dioxide (SiO2)
gemstone
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Diamond
Native Carbon (C)
gemstone
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
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
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Polished dendritic agate cabochon
Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese dendrites and possible plume inclusions
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
C (Carbon)
gemstone
Mystic Topaz (Treated Quartz or Topaz)
Silicate Mineral (SiO2 or Al2SiO4(F,OH)2) with Titanium coating
gemstone
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Polished rutilated quartz cabochon
Quartz (SiO₂) with rutile inclusions (TiO₂)
gemstone
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Polished ocean jasper / orbicular jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions
mineral