Man Made Metamorphic Style Composite

Blue Obsidian

Volcanic Glass (Amorphous)

Diamond (or Simulant)

Carbon (C)

Blue Goldstone

Man-made glass infused with copper crystals

Milky quartz (likely rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

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

Silver (Jewelry form)

Native Silver (Ag)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Painted River Rock

Artificially Coated Sedimentary Rock

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

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

Mother of Pearl (Nacre) / Shell Fragment

Biogenic Calcium Carbonate (Aragonite and Conchiolin)

Stainless Steel (Polished)

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

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Diamond (likely) in an antique gold ring

Diamond, crystalline carbon (C)

Clear quartz sphere

Quartz (silicon dioxide, SiO₂)

Goldstone

Man-made glass with copper inclusions

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Sandstone Concretion

Sedimentary Concretion (Quartz-cemented sand)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Decorated turquoise-like bead or mineral pendant

Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Concrete Fragment

Hardened Portland cement and mineral aggregate

Opalite

Synthetic Opalite Glass / Opalized Glass

Asphalt Concrete

Bituminous conglomerate

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Green sea glass or tumbled green quartz (uncertain)

Likely quartz (SiO₂) if natural; alternatively man-made soda-lime glass

Rock crystal quartz fragments

Quartz (silicon dioxide, SiO₂)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives