Mineral, Specifically A Detrital Grain

Petrified Wood

Silicified Wood (SiO2)

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) with iron oxide inclusions

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Obsidian (Apache Tear)

Volcanic Glass (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Red Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Jasper)

Silicon Dioxide (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock

Porphyritic Andesite (often called Chinese Writing Stone)

Porphyritic Basaltic Andesite with Feldspar Phenocrysts

Chert (Light Grey / Flint variant)

Cryptocrystalline Quartz (SiO2)

River Stone / Siltstone

Siltstone (composed of lithified silt)

Glauconitic Sandstone

Glauconitic arenite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Siltstone

Siltstone (primarily composed of microcrystalline Quartz and Feldspar)

Basalt

Basalt (Aphanitic-fine grained mafic igneous rock)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Litharenite)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Moonstone

Adularia (orthoclase feldspar variety)

Unakite

Unakite (Epidotized Granite)

Leopard Skin Jasper

Silicon Dioxide (SiO2) with impurities

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Petrified Wood

Silicified Wood (SiO2)

Pink Quartzite

Quartzite (mainly SiO2 with iron oxide impurities)

Red Sandstone

Arenite

Quartz (specifically Clear Quartz with iron/hematite staining)

Silicon Dioxide (SiO2)

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Red Jasper (Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Red Jasper (possibly banded)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Chert Nodule in Limestone)

Microcrystalline Quartz (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Gneiss (specifically Biotite Gneiss)

Gneiss (high-grade metamorphic rock primarily composed of Silicates)

Oolitic Limestone (Egg Stone)

Oolite (Chemical sedimentary rock, primarily CaCO3)

Quartz (specifically Milky or Rose Quartz)

Silicon Dioxide (SiO2)