Not A Rock (Man Made Industrial Metal)

Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate

Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)

Likely small metallic meteorite fragments

Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Sea Glass

Amorphous Silicon Dioxide (Man-made glass weathered by nature)

Polished banded agate pendant

Agate, a microcrystalline variety of chalcedony (SiO₂)

Red gemstone ring; likely synthetic ruby or red glass

Undetermined from the image; ruby is corundum (Al₂O₃), while red glass is amorphous silicate

Sandstone

Arenite (composed primarily of SiO2)

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Copper-bearing rock, likely native copper in a weathered matrix

Native copper (Cu), tentatively with copper sulfide/oxide minerals

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz–feldspar pegmatite fragment

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/amphibole

Quartz Vein in Schist / Gneiss

Silicon Dioxide (SiO2) in Metamorphic Matrix

Diamond (or Diamond Simulant)

Carbon (C)

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

Indeterminate metallic mineral fragments

Possibly pyrite, chalcopyrite, or metallic sulfide-bearing rock

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Iron meteorite fragment (probable)

Fe–Ni metallic meteorite, likely an octahedrite

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Black onyx or black agate bead bracelet

Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate

Blue-green crystal point, likely fluorite

Fluorite (CaF₂), tentative visual identification

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Hematite

Iron(III) oxide (Fe2O3)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper

Quartzite

Silicon Dioxide (SiO2)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Slag (Industrial Glassy Byproduct)

Anthropogenic silicate byproduct (Slag)

Blue sapphire ring

Corundum, Al₂O₃; blue color typically from trace iron and titanium

Likely weathered basaltic rock or slag-like volcanic specimen

Fine-grained mafic rock, probably basalt; exact identification requires testing

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Likely industrial slag or weathered basalt

Basaltic rock; possibly iron-rich furnace slag (diagnosis uncertain from image)

Likely gold-bearing quartz vein rock

Quartz (SiO₂), possibly with native gold and iron sulfides/oxides

Pink Quartzite

Quartzite (High-silica metamorphic rock)

Polished unakite pendant

Unakite: quartz + epidote + pink potassium feldspar

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye