Man Made Glass (Not A Natural Rock Or Mineral)

Sandstone

Arenite (specifically sublithic or quartz arenite)

Polished black stone carving, likely soapstone/steatite

Steatite (massive talc), Mg₃Si₄O₁₀(OH)₂; exact material cannot be confirmed from the image

Diamond (or Diamond Simulant)

Carbon (C)

White quartz bead bracelet (likely milky quartz)

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

Diamond

Carbon (C)

Brecciated Jasper

Brecciated Jasper (Microcrystalline Quartz / SiO2)

Natural or Cultured Pearl

Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Sandstone

Arenite (primarily SiO2)

Mixed quartz gemstone bead bracelet

Quartz, silicon dioxide (SiO₂), in varieties including smoky quartz, amethyst, rutilated quartz, and possibly tourmalinated quartz

Faceted transparent gemstone pendant

Uncertain from image; likely faceted quartz (SiO₂), cubic zirconia (ZrO₂), or glass imitation

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Diamond (in Jewelry)

Carbon (C)

Fossilized gastropod (likely nerite or related sea snail)

Gastropoda; shell composed originally of aragonite/calcite, commonly replaced or infilled by calcite

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Sandstone

Arenite (SiO2 based clastic rock)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)

Black tourmaline bead bracelet (likely schorl)

Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Sandstone

Sedimentary Rock (Quartz arenite)

Tumbled iron-rich stone, likely hematite-bearing jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite

Chert

Microcrystalline Quartz (SiO2)

Goldstone and Aura Quartz

Cuprous Glass (Goldstone) and Titanium-coated SiO2 (Aura Quartz)

Black tourmaline bead bracelet, possibly mixed with smoky quartz or brown tourmaline

Schorl tourmaline, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄; exact beads cannot be confirmed visually

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Quartz Pebble (Beach Chalcedony)

Silicon Dioxide (SiO2)

Tumbled greenstone / serpentinite (probable)

Serpentinite, chiefly Mg-rich serpentine minerals (antigorite, lizardite, chrysotile), possibly mixed with chlorite, magnetite, or carbonate

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Sandstone (likely Conglomerate or Gritstone)

Arenite (SiO2 based)

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Fossilized Bored Limestone

Limestone with Ichnofossils (Gastrochaenolites or Entobia)

Sandstone

Arenite

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Diamond (faceted)

Diamond (Pure Carbon, C)

Amethyst and aquamarine gemstone bracelet

Amethyst: purple quartz, SiO₂; blue beads likely aquamarine/blue quartz, with possible metallic spacer beads

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Blue slag glass / industrial glass fragment

Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag

Yellow chalcedony (likely lemon agate or yellow jasper)

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