Opal ring
Opal (hydrated amorphous silica, SiO₂·nH₂O)
Category
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Opal ring
Opal (hydrated amorphous silica, SiO₂·nH₂O)
Polished chrysocolla-matrix stone (probable)
Chrysocolla, hydrated copper aluminosilicate; likely mixed with quartz, turquoise, or copper minerals
Turquoise-colored ring stone (possibly turquoise or imitation)
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image
Engineered Quartz (Quartzite look-alike)
Silicon Dioxide (SiO2) composite
Weathered conglomeratic river cobble
Polymictic conglomerate or breccia, likely matrix-supported
Jade bangle
Likely nephrite jade (fibrous amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); possibly jadeite (NaAlSi₂O₆)
Connemara Marble
Calcitic Marble / Serpentinite composite
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
Iron-Nickel Meteorite (Possible Chondrite or Oxidized Iron)
Siderite (Nickel-Iron) or Chondrite (Si/Fe composite)
Polished black stone, likely black tourmaline or black obsidian
Most consistent with schorl tourmaline (NaFe3Al6(BO3)3Si6O18(OH)4), though black obsidian (volcanic glass) is also possible
Que Sera Stone (Llanite with Feldspar and Quartz)
Rhyolite with blue quartz and pink orthoclase (Llanite-type quartz porphyry)
Fossilized coral with attached shell
Likely fossil coral (Scleractinia or Tabulata), with a bivalve or gastropod shell; exact identification requires microscopy
Polished turquoise-bearing rock
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a brown host rock or matrix
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
Pearl
Nacre (aragonite, CaCO₃, with conchiolin)
Wood Paneling
Engineered Wood / Plywood Paneling
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
Mixed gemstone bead strand, likely including agate, quartz, turquoise, and sandstone beads
Varied silicate and copper-mineral materials; exact bead identities cannot be confirmed visually
Copper Composite Turquoise (Purple and Blue)
Composite Hydrous copper aluminum phosphate with bronze/copper matrix binding
Pink Zebra Jasper
Microcrystalline Quartz (SiO2)
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
Sandstone
Arenite
Tiger Iron
Composite rock (Quartz, Tiger's Eye, Hematite, and Jasper)
Unakite
Altered Granite (Epidotized Granite)
Unakite
Altered Granite (Epidotized Granite)
Marble (Sculpted Statue)
Metamorphic Limestone (composed primarily of Calcite, CaCO3)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Tourmalinated Quartz
Quartz (SiO2) with included Tourmaline (complex borosilicate)
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
Polished turquoise sphere with purple matrix/inclusion
Turquoise, hydrated copper–aluminum phosphate; approximate formula CuAl₆(PO₄)₄(OH)₈·4H₂O
Unakite
Epidotized Granite
Ruby zoisite (anyolite)
Zoisite with corundum (ruby) and commonly amphibole; Ca₂Al₃(SiO₄)₃(OH)
Black Kyanite
Aluminum Silicate (Al2SiO5)
River Pebble (Granitic / Quartzite Pebble)
Quartz-Feldspar Aggregate (SiO2 / KAlSi3O8)
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)
Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components
Ocean Jasper
Spherulitic Chalcedony (SiO2)
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)