Mineral On Sedimentary Rock

Quartz (likely Clear Quartz or Rock Crystal)

Quartz (SiO2)

Common Opal with Host Rock

Opal (Hydrated silica, SiO2·nH2O)

Hag Stone

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

Petrified Wood

Silicified Wood (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 primary composition)

Iron-stained Quartzite / Chert

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Sandstone

Arenite (composed primarily of SiO2)

Chert / Flint Nodules in Limestone

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Carnelian (Orange Agate)

Silicon Dioxide (SiO2)

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian precursor)

Chalcedony (Silicon Dioxide, SiO2)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Gneiss (Banded Gneiss)

Gneiss

Sandstone (Quartzose)

Arenite (Formula: SiO2 primary, with various cements)

Wonderstone

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Red Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)

Chert (Brown variety / Common Jasper)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (SiO2 based clastic rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Shale with Plant Fossils / Carbonaceous Shale

Laminated Mudrock (Siliciclastic)

Yellow Quartz (Chalcedony or Agate)

Silicon Dioxide (SiO2)

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Dragon Stone

Argillaceous Sedimentary Rock (Ohko Stone)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Specular Hematite

Hematite (Fe2O3)