Synthetic (Not A Natural Rock)

Shale or Siltstone

Sedimentary Rock (Siliciclastic)

Turquoise

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

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Dalmatian Stone

Peralkaline igneous rock containing quartz, feldspar, and arfvedsonite

Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with Fuchsite inclusions

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2)

Red Jasper (in Quartz/Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Granite or granitic rock fragment

Felsic intrusive igneous rock, typically quartz + feldspar + mica; exact species uncertain from the image

Pink Granite

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Conglomerate

Conglomeratic Sandstone

Clear Quartz

Silicon Dioxide (SiO2)

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Turquoise

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

Peacock Ore (Bornite or Chalcopyrite treated with acid)

Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone

Arenite (SiO2 principal component)

Raw gold nugget or gold-bearing quartz

Native gold (Au), possibly with quartz (SiO₂) and iron-oxide staining

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Sandstone Anvil / Nutting Stone

Quartzose Sandstone (Sedimentary Rock)

Granite

Phaneritic Felsic Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 primary composition)

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Dyed Pink Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Granite

Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase Feldspar)

Hag Stone

Perforated Sedimentary Rock (Typically Limestone or Sandstone)

Granite

Phaneritic Felsic Igneous Rock

Slate

Slate (foliated metamorphic rock)

Porphyritic Basalt

Porphyritic Basalt (Silicate Rock)

Granite Cobble

Phaneritic Felsic Igneous Rock

Pumice

Pumice (Vesicular volcanic glass)

Granite Pebble

Granite (Phaneritic Igneous Rock)

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Sandstone Pebble (River Rock)

Sandstone (Quartz-rich sedimentary rock with iron oxide staining)

Sandstone

Arenite (composed primarily of SiO2)

Scoria (Lava Rock)

Scoria (Mafic Volcanic Rock)

Scoria (Red Lava Rock)

Scoria (Vesicular basaltic rock)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)