Synthetic (Ceramic)

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Green faceted gemstone, likely synthetic glass or peridot

Indeterminate from image; possible peridot (olivine, (Mg,Fe)₂SiO₄) or green synthetic glass

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Water-worn ironstone pebble (probable concretion)

Ferruginous sandstone or iron-rich mudstone concretion; chiefly quartz and iron oxides/hydroxides (hematite, goethite, limonite)

Weathered iron-rich rock (likely basalt or ironstone)

Probable altered basalt; exact identification requires testing

Tumbled limestone pebble

Micritic limestone, chiefly calcite (CaCO₃)

Chert or chalcedony fragment

Microcrystalline quartz (SiO₂), possibly jasper or agate

Faceted transparent gemstone pendant

Likely cubic zirconia (zirconium dioxide, ZrO₂); possibly diamond or synthetic moissanite

Painted Rock

Weathered Sedimentary Rock (Painted)

Painted River Rock

Painted Quartzite or Smooth Siltstone

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Faceted gemstone in a jewelry setting

Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone

Pink faceted gemstone, likely synthetic or treated quartz

Quartz, silicon dioxide (SiO₂); exact identity cannot be confirmed from the image

Ruby / Red Corundum

Al2O3 (Aluminum Oxide with Chromium trace)

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Iron-stained quartz-rich rock, possibly weathered granite or quartzite

Indeterminate quartz–feldspar aggregate with iron-oxide staining; likely granitic or hydrothermal material

Rounded iron-rich river pebble

Likely limonite/goethite-bearing rock; exact identification requires testing

Iron-rich meteorite candidate

Unclassified stony-iron or ordinary chondrite candidate

Weathered iron-rich rock, likely laterite or ironstone

Goethite–hematite-bearing ferruginous laterite/ironstone; exact identification requires testing

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Dark tumbled mineral/rock fragment (tentatively hematite-rich material)

Likely hematite (Fe₂O₃), possibly magnetite-bearing ironstone

Iron-rich weathered rock (likely limonite/goethite concretion)

Limonite–goethite mixture; chiefly FeO(OH)·nH₂O

Tumbled hematite (likely hematite-rich ironstone)

Hematite, Fe₂O₃; possibly mixed with magnetite or goethite

Iron-rich meteorite candidate

Unclassified iron meteorite, possibly an ordinary chondrite or weathered iron oxide-rich meteorite

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Green gemstone ring, likely emerald simulant or jade

Uncertain; possible beryl (emerald, Be₃Al₂Si₆O₁₈) or jadeite (NaAlSi₂O₆), but the blurred image may show synthetic glass or another treated stone

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Blue Kyanite

Kyanite (Al2SiO5)

Orange Quartzite / Quartz River Siltstone

Quartzite (SiO2)

Reddish Brown Claystone or Siltstone

Argillite / Siltstone / Claystone

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Fossil shark tooth, likely megalodon

Otodus megalodon (formerly Carcharocles megalodon), fossilized tooth

Tumbled hematite

Hematite (Fe₂O₃), possibly specular or massive hematite

Tumbled cream-colored stone, likely quartz or chalcedony

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Iron meteorite (probable, possibly industrial iron slag)

Fe–Ni metallic alloy, commonly kamacite and taenite

Polished hematite (speculative)

Hematite, α-Fe₂O₃; possibly hematite-rich ironstone

Likely iron-rich sandstone or weathered jasper

Ferruginous sandstone; possibly microcrystalline quartz (jasper) with iron oxides

Siltstone (Iron-rich)

Ferruginous Siltstone

Weathered iron-rich concretion or ironstone nodule

Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)