Not A Rock (Man Made Industrial Metal)

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Sandstone

Arenite (primarily SiO2)

Basalt

Basalt (Mafic volcanic rock)

Basalt

Mafic volcanic rock (primarily plagioclase, pyroxene, and olivine)

Vesicular Basalt

Basalt (Extrusive Igneous Rock)

Basalt with Iron Oxidation

Mafic Igneous Basalt

Pyrite

Iron Disulfide (FeS2)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Quartzite

Metamorphosed Quartz Sandstone (primarily SiO2)

Gold Nugget

Native Gold (Au)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Pyrite

Iron Disulfide (FeS2)

Orange Quartzite (Tumble-polished)

Quartzite (primarily SiO2)

Vesicular Basalt (or Scoria)

Basalt (Aphanitic-Vesicular Mafic Igneous Rock)

Fluorite

Calcium Fluoride (CaF2)

Granite

Granite (Felsic intrusive igneous rock)

Fluorite

Calcium Fluoride (CaF2)

Basalt

Extrusive mafic igneous rock

Basalt (River Pebble)

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt (River Rock Cobble)

Extrusive mafic volcanic rock (Basalt)

Basalt (River Pebble)

Extrusive mafic igneous rock

Quartz Mineral

Silicon Dioxide (SiO2)

Basalt

Basalt (extrusive volcanic mafic rock)

Basalt with Scoria and potential Olivine/Pyroxene inclusions

Vesicular Basalt

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Basalt Pebble

Extrusive Mafic Igneous Rock

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Limonite (Iron Ore)

Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)

Basalt with Scoria/Vesicular Texture

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt with Vesicular Surface

Basalt (Mafic Extrusive)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Vesicular Basalt

Basalt with vesicular texture

Pyrite

Iron Pyrite (FeS₂)

Vesicular Basalt

Mafic Igneous Rock

Quartz

Silicon dioxide (SiO2)

Jasper Agate (specifically Brecciated Jasper)

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Granodiorite (foreground) and Rose Quartz (background)

Granodiorite / Quartz (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)