Man Made Mineral Simulant (Glass)

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Flint

Silicon dioxide (SiO2)

Tumbled amethyst quartz

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

Diamond

Carbon (C)

Sandstone (Pebble)

Sandstone (SiO2 with matrix/cement)

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Hematite

Iron(III) oxide (Fe2O3)

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

Tumbled obsidian

Volcanic glass; chiefly SiO₂, noncrystalline

Sandstone

Arenite (SiO2 based clastic rock)

Sandstone

Arenite (SiO2 composition dominant)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Granite (with a dark inclusion or attached fragment)

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

Diamond (in a jewelry setting)

Carbon (C)

Strawberry Quartz (or Pink Aventurine)

Quartz with Hematite/Goethite inclusions (SiO2)

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Decorative gemstone bracelet or jewelry

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

Probable amber fragment

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

Sandstone

Arenite (mostly SiO2)

Gemstone cocktail ring, likely jade and quartz or glass beads

Possible jadeite (NaAlSi₂O₆) or nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); the peach-colored beads cannot be reliably identified from the image

White quartz bead bracelet (likely milky quartz)

Quartz, silicon dioxide (SiO₂), usually microcrystalline or cloudy crystalline quartz

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Possible yellow agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony; identification is uncertain from the photo

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

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

Sandstone

Clastic sedimentary rock (primarily SiO2)

Multicolor quartz bead bracelet

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

Vesicular Basalt (Scoria)

Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)

Fossilized Burrow

Trace fossil (Ichnogenus)

Sea Glass

Amorphous Silica (Glass) SiO2

Carved Stone Turtle

Carved Soapstone and Quartz

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Pyrite

Iron Sulfide (FeS2)

Mixed beach-stone and tumbled-glass collection

Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Sandstone

Arenite (specifically sublithic or quartz arenite)

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)