Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)

Chalcedony (Quartz Var.)

Silicon Dioxide (SiO2)

Mudstone

Lutylite (group of fine-grained sedimentary rocks)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with impurities)

Turquoise

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

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartzite with Iron Inclusions

Quartzite (primarily SiO2)

Milky Quartz/Clear Quartz Cluster

Silicon Dioxide (SiO2)

Pink Quartz (Inclusion-rich Quartzite)

SiO2 (Silicon Dioxide) with Iron Oxide / Hematite inclusions

Basalt with Quartz/Feldspar Vein

Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Limonite (Iron Ore/Sandstone mixture)

Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix

Red Jasper

Jasper (Silicon Dioxide) - SiO2

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2 with minor Fe2O3)

Oolitic Chert

Oolitic Microcrystalline Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Agate (Geode nodule fragment)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (often called Flint when dark or found in chalk)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite (or Milky Quartz pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Jasper)

Quartzite

Quartzite (primarily SiO2)

Dragon Stone

Argillaceous Sedimentary Rock (Ohko Stone)

Quartzite pebble

Quartzite (SiO2)

Granite

Phaneritic Granitoid (Primary minerals: Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Gneiss

High-grade foliated metamorphic rock

Quartz (Milky/Common)

Silicon Dioxide (SiO2)