Not A Natural Rock (Man Made Composite)

Turquoise in Matrix

Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O

Carnelian and White Quartz Bracelet

Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz

Red Granite

Felsic intrusive igneous rock (K-feldspar rich Granite)

Tumbled black-and-white stone, likely dendritic agate or jasper

Cryptocrystalline quartz (SiO₂), possibly chalcedony with manganese-oxide dendrites

Chrysocolla in Jasper (Chryso-Jasper)

Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)

River Cobble (Basalt or Greywacke)

Extrusive Mafic Igneous Rock (likely Basalt)

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Yellow Ocherous Siltstone (Limonitic Shale)

Limonitic Siltstone / Goethite-rich Sedimentary Rock

Banded limestone or marble

Calcite-dominated carbonate rock; likely banded marble (CaCO₃)

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Piddock bored rock (Boring Stone)

Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Turquoise (Green variety)

Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Rounded weathered granite (granitoid cobble)

Granite, composed mainly of quartz, feldspar, and mica/amphibole

Quartz (likely) or a Quartzite Pebble

Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.

Dyed Agate

Agate (Cryptocrystalline Quartz), SiO2

Jasper / Flint / Chert

Microcrystalline Quartz (SiO2)

Precious Red Coral

Corallium rubrum / Corallium japonicum

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Hag Stone (Quartz Pebble with Natural Hole)

Quartz (Silicon Dioxide - SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Polished turquoise

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

Golem

Megaton Pokémon (Lithos sapiens megalithos)

Ferruginous Sandstone (Iron-rich Sandstone)

Ferruginous Arenite

Amber (Cherry or Red variety)

Succinite (with various trace amounts of organic compounds)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Quartz (various varieties)

SiO₂ (Silicon Dioxide)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Scoria (vesicular basalt)

Scoria; vesicular mafic volcanic rock, commonly basaltic in composition

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Shale

Shale (clastic sedimentary rock)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Granite (Weathered)

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Tumbled dark river pebble, probably basalt

Fine-grained mafic volcanic rock, most likely basalt; exact identification requires testing

Scoria (Red Lava Rock)

Scoria (Vesicular Basalt/Andesite)