Diamond (in jewelry)
Cubic Carbon (C)
mineral
Category
Man Made Object (Ring)
Browse man made object (ring) specimens identified by the Rock Identifier community.
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Sandstone (with Liesegang rings)
Quartz Sandstone (SiO2 with Fe-oxide staining)
sedimentary
Chelyabinsk Meteorite
Ordinary chondrite (LL5)
meteorite
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Slate
Slate (Metamorphic Rock)
metamorphic
Andesite River Cobble
Andesite (Intermediate Volcanic Rock)
igneous
Orange Calcite
Calcite (CaCO3)
Mineral
Citrine
Silicon Dioxide (SiO2)
gemstone
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
gemstone
Amygdaloidal Basalt with Agate/Quartz Infill
Basalt with Secondary Silicate Mineralization (SiO2)
igneous
Greenstone Celt (Polished Stone Axe)
Metamorphosed mafic rock (often Basalt or Diabase)
metamorphic
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Fossilized Wood (Petrified Wood) and Associated Rocks
Silicified Wood / Xylopal
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Pumice
Vesicular Rhyolite or Andesite (Amorphous volcanic glass)
igneous
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2 - Silicon Dioxide)
metamorphic
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Tiger's Eye (Inlaid in a band)
SiO2 (Silicon Dioxide with Crocidolite inclusions)
mineral
Black Opal Ring (Carved Opal)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone
Fossil gastropod shell
Fossilized marine gastropod; exact genus/species requires locality and examination
fossil
Polished orbicular/porphyritic granite or breccia
Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image
igneous
Polished orbicular stone, likely granite or diorite
Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite
igneous
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
gemstone
Blue Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
mineral
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Jade (likely Nephrite or Jadeite)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
Metamorphic rock (for Nephrite and some Jadeite); Mineral (for Jadeite)
Nephrite Jade
Nephrite
Mineral/Rock
Tumbled carnelian agate with dark mineral inclusions
Carnelian, an orange variety of microcrystalline quartz (chalcedony), SiO₂; dark inclusions are likely iron oxides/hydroxides, possibly hematite, goethite, or a basaltic/matrix fragment
gemstone
Greenschist / Greenstone
Greenschist (composed of chlorite, epidote, actinolite, albite)
metamorphic
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Ruby and Sapphire Cluster Ring
Corundum (Al2O3)
gemstone
Petrified Wood (Silicified Wood)
Silicified Wood / Silicon Dioxide (SiO2)
metamorphic
Slate
Slate (Metamorphic Rock)
metamorphic
Diamond (or Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Diamond (in a jewelry setting)
Carbon (C)
mineral
Slate
Foliated Metamorphic Rock (Slate)
metamorphic