Synthetic (Not A Natural Rock)

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Sapphire

Corundum (Al₂O₃) with trace elements causing color variations.

Turquoise

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

Ferruginous Sandstone (Iron-rich Sandstone)

Ferruginous Arenite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Clear Quartz

Silicon Dioxide (SiO2)

Red Granite

Felsic intrusive igneous rock (K-feldspar rich Granite)

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Glauconitic Sandstone (Greensand)

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

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

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)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Golem

Megaton Pokémon (Lithos sapiens megalithos)

Piddock bored rock (Boring Stone)

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

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Green Druzy Quartz (Prasiolite)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO ₂)

Granite

Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)

Shale creek bed

Shale (fine-grained clastic sedimentary rock)

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

Granite

Phaneritic plutonic rock (dominated by SiO2, Al2O3, K2O, Na2O)

Black Onyx

Silicon dioxide (SiO2) - Chalcedony variety

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Druzy Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (general term for sandstone)

Shale

Shale (clastic sedimentary rock)

Quartz (likely) or a Quartzite Pebble

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

Turquoise

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

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