Man Made Object (Ring)

Diamond

Native Carbon (C)

Likely yellow quartz gemstone ring

Quartz (SiO₂), possibly heat-treated citrine or lemon quartz; metal setting appears to be brass/gold-colored alloy

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Diamond

Carbon (C)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Beads (likely glass or man-made material)

N/A (artificial material)

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Opalite

Synthetic glass / Opaque silicious glass

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

White chalcedony cabochon ring

Chalcedony (microcrystalline quartz, SiO₂), likely white quartz variety

Polished white chalcedony or quartz pendant

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

Yellow faceted gemstone, likely citrine or yellow sapphire

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

Opalite

Man-made opalescent glass

Goldstone

Aventurine Glass (Man-made)

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Green Agate

Silicon dioxide (SiO₂)

Possible obsidian or slag glass

Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Diamond ring

Diamond, crystalline carbon (C)

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

Tumbled brown jasper pebble

Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Diamond (or Simulant)

Carbon (C)

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Sea Glass

Silicon dioxide (mostly)

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Black tumbled stone, possibly obsidian

Obsidian (volcanic glass; predominantly SiO₂), identification uncertain from image

Sea Glass

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

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Porcelain (Kaolin-based)

Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)