Man Made Object (Metalwork)

Blue Obsidian (Cullet Glass)

Man-made silicate glass

Sea Glass

Man-made silicate glass

Opalite

Man-made opalescent glass

Opalite

Man-made opalized glass

Goldstone

Aventurine Glass (Man-made)

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Unidentified gray metallic object

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

Goldstone beads (likely brown goldstone)

Man-made copper-bearing glass; not a natural mineral. Often sold as “aventurine glass.”

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Sea Glass

Amorphous silicon dioxide

Opalite

Synthesized glass / Silicon dioxide

Opalite

Synthetic glass / Opaque silicious glass

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Opalite crescent pendant

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

Beads (likely glass or man-made material)

N/A (artificial material)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Polished brown jasper (likely brecciated or orbicular jasper)

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

Goldstone (brown goldstone)

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

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Obsidian

Volcanic Glass

Blue Obsidian

Volcanic Glass (Amorphous)

Diamond (or Simulant)

Carbon (C)

Blue Goldstone

Man-made glass infused with copper crystals

Polished white chalcedony or quartz pendant

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

Blue opalescent glass-like gemstone (possibly imitation opalite)

Likely man-made opalite glass; composition varies, typically silica-based glass

Sea Glass

Silicon dioxide (mostly)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Possible obsidian or slag glass

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

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

Polished black pebble, possibly obsidian

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

Polished labradorite sphere

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

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Small black stone fragment (possibly obsidian)

Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)

Obsidian

Volcanic Glass

Red-orange cabochon, likely carnelian or glass imitation

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

Sea Glass

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

Stainless Steel (Polished)

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