Mineral (Man Made Glass)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Sandstone (likely Quartzose Sandstone)

Arenite

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Pumice

Pumice (Vesicular volcanic glass)

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)

Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Smoky Quartz

Silicon Dioxide (SiO2)

Moissanite

Silicon Carbide (SiC)

Diamond

Carbon (C)

Tumbled chalcedony (likely milky quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartzite

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Obsidian

Volcanic Glass (70% or more SiO2)

Granite

Phaneritic Felsic Igneous Rock

Flint

Silicon dioxide (SiO2)

Red-and-white jasper/chalcedony pebble

Microcrystalline quartz (SiO₂), likely hematite- or iron-oxide-bearing jasper with white chalcedony/quartz

Tumbled amethyst quartz

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Flint (gray chert)

Microcrystalline quartz (SiO₂), a variety of chert

Sea Glass

Amorphous Silica (Glass) SiO2

Decorative gemstone bracelet or jewelry

Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads

Faceted colorless gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂), though the strong glare and visible facet pattern could indicate cubic zirconia or lead glass

Flint (chert) fragment

Microcrystalline quartz (SiO₂), commonly called flint when dark

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

Tumbled purple chalcedony or low-grade amethyst bead bracelet

Chalcedony (microcrystalline SiO₂), possibly quartz/amethyst; composition is SiO₂

Diamond

Carbon (C)

Diamond (Colorless/White)

Carbon (C)

Tektite

Impactite (Natural Silicate Glass)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Amethyst (with Pyrite and other minerals)

Silicon Dioxide (SiO2)

Granite (with a dark inclusion or attached fragment)

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

Tumbled brown chalcedony or jasper

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper

Strawberry Quartz (or Pink Aventurine)

Quartz with Hematite/Goethite inclusions (SiO2)

Probable amber fragment

Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

Pumice

Pumice (Vitreous volcanic rock)

Obsidian (volcanic glass)

Obsidian, naturally occurring rhyolitic volcanic glass; composition is silica-rich, commonly about 70–75% SiO₂

Raw quartz crystal pendant

Quartz (silicon dioxide, SiO₂), likely milky or cloudy quartz

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides