Man Made Mineral Simulant (Glass)

Green sea glass (likely bottle glass)

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

Clear quartz fragment (rock crystal)

Quartz, silicon dioxide (SiO₂)

Rock crystal quartz fragments

Quartz (silicon dioxide, SiO₂)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Black glassy fragment, likely obsidian or industrial glass

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

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Green sea glass or tumbled green quartz (uncertain)

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

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Slag

Anthropogenic glassy silicate

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Asphalt Concrete

Bituminous Concrete

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Polished labradorite sphere

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

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Diamond

Native Carbon (C)

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Sea Glass

Man-made silicate glass weathering product

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Aura Quartz (Rainbow Quartz)

Silicon Dioxide (SiO2) with metallic vapor coatings

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Goldstone (Brown)

Aventurine Glass (Silicon Dioxide infused with Copper crystals)

Green obsidian (likely molded or heat-treated glass-like specimen)

Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

Sandstone Concretion

Limonitic Sandstone Concretion

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Polished labradorite pendant

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Stainless Steel (Polished)

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)