Organic Materia (Not A Rock Or Mineral)

Schist

Schist (various mineral compositions)

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Sandstone (Green/Yellow Siltstone variant)

Arenite or Siltstone (primarily SiO2 with mineral staining)

Sandstone Cobble

Arenite (Secondary classification based on grain size)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)

Chalcedony Nodule (Agate/Chert)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Muscovite Mica (Golden/Yellow variety)

KAl2(AlSi3O10)(F,OH)2

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2, often with CaCO3 or Fe2O3 cement)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Jasper

Silicon Dioxide (SiO2) with impurities

Yellow Quartz (Chalcedony)

Quartz / Chalcedony (Silicon Dioxide, SiO2)

Granite

Felsic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Basalt

Mafic volcanic rock (various silicate minerals including Pyroxene and Plagioclase)

Basalt with Iron Oxidation

Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Sapphire (Corundum)

Corundum (Al2O3)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Druzy Quartz Geode (likely Smokey Quartz variety)

Silicon Dioxide (SiO2) - specifically a geode formation lined with druzy quartz crystals, with a likely brownish hue indicating smokey quartz.

Milky Quartz (Gold-bearing Prospecting Specimen)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Chert (Silicon Dioxide, SiO2)

Schist

Mica Schist

Unakite

Epidotized Granite

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Sandstone (Quartzose Pebble)

Clastic Sedimentary Rock (Litharenite/Quartz arenite)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Tiger's Eye

Pseudomorph of Crocidolite (SiO2 with iron oxides)

Chert (Flint)

Silicon Dioxide (SiO2)

Basalt with Iron Oxides

Mafic Igneous Rock (Mafite)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2)

Limestone (specifically Travertine or Tufa)

Calcium Carbonate (CaCO3)

Druzy Quartz

Silicon Dioxide (SiO2)

Sandstone Concretion

Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)

Quartz / River Cobble

Silicon Dioxide (SiO2)