Not A Rock Or Mineral (Anthropogenic Material)

Dalmatian jasper (Dalmatian stone)

Feldspar-rich porphyritic igneous rock, commonly sold as Dalmatian jasper; dark spots are mainly amphibole and/or tourmaline minerals

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Sandstone (Beach Pebble)

Clastic sedimentary rock (primarily Quartz and Feldspar)

Sandstone

Arenite (SiO2 principal)

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Sandstone

Sedimentary Rock (Quartz arenite / Lithic sandstone)

Banded sedimentary rock (likely sandstone or siltstone)

Layered siliciclastic sedimentary rock; exact identification is not possible from the image alone

Granite

Felsic intrusive igneous rock

Quartz vein fragment

Quartz (SiO₂), likely milky quartz with iron-oxide staining

Fossilized Bone Fragment

Vertebrate Fossil

Sandstone

Arenite

Quartz pebble

Silicon dioxide (SiO2)

Small pale-green stone, possibly serpentine or quartz

Undetermined from the image; no diagnostic features confirm a specific mineral

Weathered mineralized rock fragment

Indeterminate; likely quartz–feldspar-rich lithic material with iron-oxide staining

Sandstone

Sedimentary Rock (Quartz arenite)

Weathered quartz-bearing rock

Quartz-rich vein material; likely quartz with iron oxides and feldspar, exact rock type uncertain

Quartz-bearing geode or vuggy quartz specimen

Quartz, silicon dioxide (SiO₂), possibly with chalcedony and iron-oxide staining

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Sandstone

Arenite (SiO2 based)

Granite

Granite (Felsic Plutonic Rock)

Sandstone

Quartzose Sandstone (Sedimentary Rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Limonitic/Iron-stained)

Sandstone (containing Quartz, SiO2, and Limonite, FeO(OH)·nH2O)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite

Sandstone (Quartzose)

Arenite (SiO2 based typically)

Botryoidal chalcedony (likely agate/jasper nodule)

Microcrystalline quartz, SiO₂; commonly mixed with iron oxides and clay minerals

Natural turquoise-bearing rock

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a limonite or host-rock matrix

Banded Jasper

Silicate Mineral (Microcrystalline Quartz / SiO2)

Sandstone

Arenite

Sandstone

Arenite (typically SiO2 based)

Sandstone (with potential Concretion or Fossil fragment)

Arenite (primarily SiO2)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Likely rough garnet

Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃); identification is uncertain from the image

Banded Ironstone / Jasper Siltstone

Siltstone with Iron Oxide Hydrates (SiO2 with Fe2O3/FeO(OH))

Amygdaloidal Basalt with Quartz

Basalt with Secondary Mineral Infilling

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Greenstone / altered basalt fragment

Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing

Iron-rich weathered rock fragment

Indeterminate; likely limonite/goethite-bearing sandstone or lateritic ironstone