Man Made Object (Metal Alloy)

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Gold

Aurum (Au)

Black tumbled stone, possibly obsidian

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

Polished black stone, likely obsidian

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

Goldstone

Man-made glass with copper inclusions

Copper

Native Copper (Cu)

Bismuth Crystal

Bismuth (Bi)

Translucent greenish gemstone, possibly jade or quartz

Not reliably identifiable from the image; candidate materials include jadeite (NaAlSi₂O₆), nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), or quartz (SiO₂)

Amber-set ring

Amber (fossilized plant resin; organic mineraloid), set in a metal ring

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Green gemstone in a jewelry setting (possibly emerald or green glass)

Not identifiable from the image; if natural emerald, beryl (Be₃Al₂Si₆O₁₈)

Gem-set gold ring

Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring

Iron Meteorite

Iron-nickel alloy (e.g., Kamacite, Taenite)

Beryl

Beryllium Aluminum Silicate (Be3Al2(SiO3)6)

Aquamarine

Beryl (Be3Al2Si6O18)

Granite (with a dark inclusion or attached fragment)

Granite, mainly quartz, feldspar, and mica; the dark object cannot be identified confidently from the photo.

Polished brecciated jasper pendant

Jasper, an opaque microcrystalline variety of chalcedony (mostly SiO₂), with iron-oxide staining and likely brecciation

Diamond-set gold ring

Diamond (carbon, C) in a gold-alloy setting; the stone may be a diamond or a diamond simulant

Concrete Fragment

Hardened Portland cement and mineral aggregate

Asphalt Concrete

Bituminous conglomerate

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Bismuth

Native Bismuth (Bi)

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Iron-Nickel Meteorite Fragment (Unclassified)

Iron-Nickel Alloy (Taenite and Kamacite)

Goldstone

Man-made glass with copper inclusions

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Green Sea Glass

Man-made silicate glass (weathered)

Faceted transparent gemstone pendant

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

Black onyx or black agate bead bracelet

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

Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Garnet-set butterfly brooch

Likely almandine or pyrope garnet, iron–aluminum silicate (Fe₃Al₂Si₃O₁₂ or Mg₃Al₂Si₃O₁₂)

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)