Mineral Within A Sedimentary Rock

Sandstone (with Iron Oxide)

Arenite with Limonite/Hematite staining

Sandstone

Sandstone (lithified arenite/wacke)

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Granitic Pegmatite

Coarse-grained Granite (KAlSi3O8 + SiO2)

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Quartz Crystal (specifically a small Clear Quartz point)

Silicon Dioxide (SiO2)

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

Mica Schist

Foliated Metamorphic Rock (Schist)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Carnelian

Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dolomite or Limestone (Carbonate Rock)

CaMg(CO3)2 (Dolomite) or CaCO3 (Limestone / Calcite)

Sandstone (Greywacke)

Sandstone (SiO2 enriched with lithic fragments)

Moqui Marble (Moqui Ball)

Ironstone Concretion (Goethite/Hematite cemented Sandstone)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Banded Iron Formation

Banded Iron Formation (BIF)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Granite

Intrusive igneous rock (high SiO2)

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Quartz (with iron oxide staining)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone Clast

Arenite (primarily SiO2)

Gneiss

High-grade foliated metamorphic rock

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Chert (Pink variety/Jasper)

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Yellow Quartzite

Quartzite (SiO2)