Man Made Object (Metal Alloy)

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Hematite

Iron(III) oxide (Fe2O3)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Diamond

Native Carbon (C)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Fossilized coral with attached shell

Likely fossil coral (Scleractinia or Tabulata), with a bivalve or gastropod shell; exact identification requires microscopy

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Pyrulite (Pyrite / Chalcopyrite)

Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Copper (native copper)

Native copper, Cu

Native Copper

Native Copper (Cu)

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxide-coated

Likely iron-rich meteorite or hematite-rich rock

Uncertain; possible iron meteorite (Fe–Ni alloy) or limonite/goethite-bearing hematite

Carborundum

Silicon Carbide (SiC)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Gold Nugget

Native Gold (Au)

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Diamond ring (likely diamond with gold band)

Diamond, crystalline carbon (C); band appears gold alloy

Copper ore-bearing rock (likely malachite/chrysocolla in a sulfide-rich matrix)

Cuprite–malachite/chrysocolla mineralization; probable copper sulfides such as chalcopyrite in altered host rock

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Likely clear quartz crystal or glass-like gemstone

Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image

Faceted gemstone in a jewelry setting

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

Green jade bead necklace

Most likely nephrite jade (a tough, interlocking amphibole aggregate; commonly tremolite–actinolite), though jadeite jade or dyed serpentine is possible from the image alone.

Inlaid stone ring (likely jasper or agate)

Likely microcrystalline quartz (chalcedony, SiO₂), possibly jasper, with decorative mineral inlays

Iron meteorite (likely etched or weathered iron meteorite)

Fe–Ni alloy, predominantly kamacite and taenite; possible ataxite/hexahedrite or coarse octahedrite

Possible iron meteorite

Iron meteorite, likely an ataxite or coarse octahedrite; composition mainly Fe–Ni alloy

Likely smoky quartz pendant

Smoky quartz, silicon dioxide (SiO₂), quartz variety colored by irradiation-related defects