Man Made Material (Jewelry, Metal Alloy)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Ruby in Matrix

Corundum (Al2O3)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

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

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag

Asphalt Pavement (with aggregate)

Asphalt concrete

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Meteorite

Chondrite / Iron-Nickel Meteorite fragment

Chert

Chert (SiO2)

Cobalt Blue Slag Glass

Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Porcelain Tile (Sandstone-look)

Man-made Ceramic (resembling Quartz-rich Sandstone)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar

Asphalt aggregate (crushed stone in bitumen)

Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Diamond (in a gold setting)

Carbon (C)

Onyx (Black) and Mother of Pearl Inlay

Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Note on Image Identification: Textile

N/A (Anthropogenic material)

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Bismuth Crystal

Bismuth (Bi)

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint var.)

Silicon Dioxide (SiO2)

Diamond ring

Diamond (crystalline carbon, C)

Gemstone Ring

N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ

Emerald

Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Chert (and Agate/Chalcedony)

Microcrystalline Quartz (SiO2)

Quartz-bearing Pegmatite with Metallic Sulfides

Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica

Chert (Flint)

Silicon dioxide (SiO2)

Likely small metallic meteorite fragments

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

Slag (Industrial Glass Slag)

Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)

Dark igneous rock, likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine

Chert (Chert / Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Diamond

Native Carbon (C)