All rocks & minerals

Gem-set gold ring

Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring

Faceted clear gemstone ring

Likely colorless quartz (SiO₂); the photo does not establish the stone’s identity

Faceted clear gemstone ring, likely quartz or glass imitation

Unidentified colorless faceted material; quartz (SiO₂) is possible, but the image cannot distinguish it from glass or another gem

Landscaping river rock (mixed rounded pebbles)

Mixed lithologies; likely water-worn quartzite, granite, and other silicate pebbles

Diamond (likely) in an antique gold ring

Diamond, crystalline carbon (C)

Gem-set gold ring

Likely a faceted diamond (carbon, C) set in a gold-alloy ring; the surrounding stones are not identifiable from the image.

Pink-purple faceted gemstone ring (likely garnet)

Likely almandine–pyrope garnet, (Fe,Mg)₃Al₂(SiO₄)₃; identification from the image is uncertain.

Faceted clear gemstone in a gold-colored ring

Unidentified transparent faceted gem; possibilities include colorless quartz (SiO₂), glass, or diamond (C)

Diamond (set in jewelry)

Carbon (C)

Diamond-set gold ring

Diamond (carbon, C) in a gold-alloy setting; the stone may be a diamond or a diamond simulant

Gem-set gold ring

Likely gold alloy set with a colorless gemstone, possibly diamond or clear quartz; the stone cannot be identified reliably from the image

Diamond ring (likely a faceted clear gemstone)

Diamond, crystalline carbon (C); the setting appears to be gold-colored metal

Gem-set gold ring

Gold alloy setting with a colorless faceted gemstone, possibly quartz or glass; the stone cannot be identified reliably from the image

Pyrite (fool’s gold)

Pyrite, FeS₂

Diamond-set gold ring

Diamond (carbon, C) in a gold alloy setting; the image does not establish the stone’s identity or authenticity

Clear faceted gemstone in an ornate ring (likely quartz or glass imitation)

Unidentified colorless faceted stone; visual identification is inconclusive

Faceted clear gemstone in a gold-colored ring

Unidentified colorless faceted gem; possibly quartz, glass, or another transparent gem material

Faceted clear gemstone in a gold-colored setting

Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem

Polished ammonite fossil

Ammonoidea (likely a polished ammonite shell; exact species indeterminable from the image)

Diamond-set gold ring

Diamond (carbon, C) in a gold alloy setting; the clear center stone may be a diamond or a diamond simulant

Diamond-set gold ring

Diamond (carbon, C; cubic crystal structure), set in a gold alloy

Diamond

Diamond (Native Carbon, C)

Faceted clear gemstone ring, likely white sapphire or diamond

Unidentified colorless gemstone; diamond (C) or sapphire (Al₂O₃) cannot be distinguished from the image

Diamond (set in an ornate ring)

Diamond, crystalline carbon (C)

Diamond ring

Diamond, crystalline carbon (C), set in a gold-colored metal ring

Gold ring with a clear faceted gemstone

Likely colorless diamond (carbon, C); identification from the image is uncertain

Gold ring with a clear faceted gemstone

Likely diamond (crystalline carbon, C); identification is uncertain from the image

Diamond-set gold ring (stone identity uncertain)

Possible diamond (crystalline carbon, C); metal setting appears gold-colored

Faceted clear gemstone in a metal setting

Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.

Precious Coral and Jade

Corallium rubrum / Corallium spp. (Coral, CaCO3) and Nephrite/Jadeite (Jade, Ca2(Mg,Fe)5Si8O22(OH)2 / NaAlSi2O6)

Jade and chalcedony-style costume ring

Likely nephrite or jadeite (green cabochons) with orange/cream chalcedony or glass-like beads; identification from the photo is uncertain

Likely jade and pink gemstone jewelry

Green material may be jadeite (NaAlSi₂O₆) or nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); pink beads are unidentified, possibly quartz or coral

Tumbled orange aventurine (likely orange quartzite)

Quartz-rich quartzite, mainly SiO₂; orange color likely from iron-oxide inclusions

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica or amphibole.

Dyed turquoise-colored tumbled stone, possibly howlite or magnesite

Likely dyed Ca₃Si₃O₉(OH)₂ (howlite) or MgCO₃ (magnesite); exact material cannot be confirmed visually

Pink granite

Granite, composed mainly of potassium feldspar, quartz, and dark mica/amphibole

Pink coral and green-stone jewelry

Likely pink coral (calcium carbonate, CaCO₃) set with an unidentified green stone; the image is too indistinct to identify the green material reliably.

Mica-rich schist (probable)

Mica schist, likely muscovite–biotite schist; exact identification requires examination or testing

Pink faceted gemstone ring (stone unidentified)

Possibly pink tourmaline (elbaite); image alone cannot confirm the gem or whether it is natural

Gemstone cocktail ring, likely jade and quartz or glass beads

Possible jadeite (NaAlSi₂O₆) or nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); the peach-colored beads cannot be reliably identified from the image

Likely marcasite jewelry (metal brooch and earrings)

Marcasite, FeS₂ (often pyrite or marcasite stones set in silver)

Gold coin pendant on a chain

Gold (Au), likely a coin set in a gold-colored metal mount