Not A Natural Rock (Man Made Composite)

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.

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Shale

Shale (clastic sedimentary rock)

Shale

Shale (fine-grained clastic sedimentary rock)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Turquoise in Matrix

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

Granite (Weathered)

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

Turquoise

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

Golem

Megaton Pokémon (Lithos sapiens megalithos)

Quartz (various varieties)

SiO₂ (Silicon Dioxide)

Piddock bored rock (Boring Stone)

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

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Limonite (Yellow Ochre)

FeO(OH)·nH2O (Hydrous iron(III) oxide-hydroxide mixture)

Green Druzy Quartz (Prasiolite)

Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)

Amber (Cherry or Red variety)

Succinite (with various trace amounts of organic compounds)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO ₂)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Shale creek bed

Shale (fine-grained clastic sedimentary rock)

Scoria (Red Lava Rock)

Scoria (Vesicular Basalt/Andesite)

Sandstone

Arenite (general term for sandstone)

Black Onyx

Silicon dioxide (SiO2) - Chalcedony variety

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Sandstone

Sandstone (lithified arenite/wacke)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Turquoise

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

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Quartzite

Quartzite (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various additives

Sea Glass (Uranium/Vaseline Glass variant)

Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)

Sandstone

Quartz Arenite (a type of sandstone composed of more than 90% quartz)

Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)

Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.

Clear Quartz (Crystal Quartz)

Silicon Dioxide (SiO2)