Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Yellow Quartzite Pebble

Quartzite (primarily SiO2)

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Sandstone (Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Tiger's Eye

Silicon dioxide with crocidolite fibers (SiO2 with chrysotile amphibole inclusions)

Hag Stone

Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Agate (specifically Waterline or Onyx-type Agate)

Silicon Dioxide (SiO2) - variety Chalcedony

Ferruginous Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Banded Jasper (Carnelian Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Granite

Phaneritic Felsic Intrusive Igneous Rock

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

Orange Quartzite / Quartz River Siltstone

Quartzite (SiO2)

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Sedimentary Breccia

Breccia (Clastic Sedimentary Rock)

Jasper River Pebble

Silicon Dioxide (SiO2)

Carnelian (Red Agate/Chalcedony)

Cryptocrystalline Quartz (SiO2) with Hematite impurities

Ironstone (Limonitic Concretion)

Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions

Jasper (Red and Tan Jasper)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Granite Pebble

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

Basalt with Quartz/Zeolite Inclusions

Porphyritic Basalt (SiO2 with Aluminosilicates)

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Orange Quartzite / River Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite (Beach Pebble)

Quartzite (primarily SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polychrome Jasper

Silicon Dioxide (SiO2) with impurities

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Shale

Fissile mudstone (primarily clay minerals and silt-sized quartz)

Agate (Moss or Banded Agate variety)

Agate (Silicon Dioxide - SiO2)

Jasper (Green)

Silicon Dioxide (SiO2) with impurities

Yellow Quartzite

Metamorphosed Quartz (SiO2)