Synthetic (Not A Rock Or Mineral)

Small colored gemstone or glass cabochons (uncertain)

Not identifiable from the image; the pieces may be colored glass or synthetic stones rather than natural minerals.

Quartz Druzy on Geode Fragment

Silicon Dioxide (SiO2)

Dyed druzy quartz pendant

Quartz, SiO₂; likely a dyed druzy quartz cluster

Breccia

Breccia - Clastic sedimentary rock

Sea stacks and coastal cliffs

Likely basaltic sea stacks (rock type cannot be confirmed from the image)

Amethyst (likely synthetic or treated)

Purple quartz, SiO₂; color caused mainly by trace iron and irradiation

Silicon Carbide

Silicon Carbide, SiC

Polished turquoise cabochon pendant

Turquoise, hydrated copper-aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or matrix-bearing material

Likely biotite-rich schist

Mica schist, chiefly quartz and mica (commonly biotite; possible muscovite)

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite-rich greenschist; commonly composed of chlorite, actinolite, and epidote

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Likely sodalite (rough blue specimen)

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Opalite

Man-made glass (traditionally simulated Opal)

Blue-green turquoise (probable)

Turquoise, hydrous copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Rounded greenish-gold rock or mineral pebble

Indeterminate; possibly serpentine-rich stone, weathered sulfide, or iron-stained metamorphic rock

Green faceted or cabochon gemstone (possibly glass or synthetic)

Undetermined; possibilities include green beryl (Be₃Al₂Si₆O₁₈), quartz (SiO₂), or synthetic glass

Blue Goldstone

Man-made glass infused with copper crystals

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Tumbled turquoise-like stone

Likely turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Painted River Rock

Anthropogenic-modified Siliciclastic Sedimentary Rock

Granite (likely weathered, coarse-grained specimen)

Granite; chiefly quartz, feldspar, and mica

Milky quartz-bearing rock

Quartz, silicon dioxide (SiO₂), likely massive quartz with iron-oxide staining

Clear gemstone earring (likely cubic zirconia)

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); identification from the image is uncertain

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Tumbled greenstone or serpentinite pebble

Likely serpentine-group rock (serpentinite); exact identification is uncertain from the image

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock

Red jasper

Jasper, a microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Opalite

Synthetic Opalized Glass

Silicon

Element Si

Opalite

Synthetic glass / Opalized glass

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides and hydroxides

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Polished feldspar-rich granite

Granite, primarily quartz (SiO₂), feldspar, and mica

Opalite

Synthesized glass / Silicon dioxide

Dyed Quartz Pendant

Silicon Dioxide (SiO2) with artificial dye

Unidentified small rock or mineral fragment

Indeterminate from the blurred image; possibly quartz-rich stone, feldspar, or weathered concrete-like geological material

Likely bismuth crystal

Synthetic bismuth (Bi), crystallized from molten metal; not a natural rock-forming specimen

Opalite

Synthetic opalescent glass

Dalmatian Stone

Dalmatian Stone (Felsic Igneous Rock)