Man Made Object (Ring)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Carnelian

Orange-red chalcedony (microcrystalline quartz, SiO₂)

Ruby in Fuchsite

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Polished brecciated jasper pendant

Jasper, an opaque microcrystalline variety of chalcedony (mostly SiO₂), with iron-oxide staining and likely brecciation

Petrified Wood

Silicified Wood (mainly Quartz / SiO2)

Jade (Jadeite or Nephrite)

Jadeite (NaAlSi2O6) or Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Pumice

Pumicite (Amorphous Volcanic Glass)

Gold Ore (in Quartz/Pyrite)

Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)

Ruby (or potential synthetic/imitation)

Corundum (Al2O3)

Petrified Wood

Silicified Wood (SiO2)

Diamond

C (Native Carbon)

Red faceted gemstone ring

Likely synthetic ruby or red spinel; exact identification requires testing

Brecciated Agate / Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jade

Jadeite or Nephrite

Blue slag glass or dyed glass-like industrial material

Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Agate

Silicon Dioxide (Chalcedony), SiO2

Beaded gemstone jewelry, likely carnelian and green aventurine

Carnelian: orange chalcedony (microcrystalline SiO₂); green aventurine: quartz with fuchsite or other inclusions (SiO₂)

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Blue gemstone bead bracelet, likely lapis lazuli or dyed stone

Uncertain from image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or dyed quartz/glass imitation

Diamond

Carbon (C)

Tumbled orange chalcedony / jasper

Microcrystalline quartz, SiO₂, likely iron-stained chalcedony or quartz-rich jasper

Orbicular Gabbro

Orbicular Gabbro

Black Onyx

Black Chalcedony (SiO2)

Diamond (set in jewelry)

Diamond (Carbon, C)

Black Onyx

Chalcedony (SiO2)

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Turquoise cabochon ring

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Green Chalcedony (likely Chrysoprase or dyed Green Agate)

Silicon Dioxide (SiO2) with nickel impurities or chromium/dye

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Liesegang Ring Siltstone

Siltstone with iron oxide Liesegang bands

Iron-stained fossiliferous rock, possibly fossil wood

Likely silicified/petrified wood in iron-rich silica matrix; exact identification requires microscopy

Native Silver

Silver (elemental Ag)

Likely moonstone ring

Moonstone, a feldspar variety with adularescence; typically orthoclase (KAlSi₃O₈), sometimes with albite intergrowths

Emerald and diamond ring

Emerald: beryl, Be3Al2Si6O18, colored green by chromium and/or vanadium; surrounding stones appear to be diamonds, crystalline carbon (C)

Diamond cluster ring

Diamond (carbon, C), faceted and set in jewelry

Turquoise cabochon ring

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O