Mineral On Sedimentary Rock

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Quartz Crystal (specifically a small Clear Quartz point)

Silicon Dioxide (SiO2)

Slate

Slate (Foliated Metamorphic Rock)

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

Red Sandstone

Arenite (high iron oxide content)

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)

Dolomite or Limestone (Carbonate Rock)

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

Chert / Chalcedony (likely carnelian or flint variety)

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Sandstone (Greywacke)

Sandstone (SiO2 enriched with lithic fragments)

Banded Iron Formation

Banded Iron Formation (BIF)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Gneiss (Metamorphic Rock)

Gneiss

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Quartz (with iron oxide staining)

Silicon Dioxide (SiO2)

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Sandstone (Red/Brown Variety)

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

Sandstone Clast

Arenite (primarily SiO2)

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Gneiss

High-grade foliated metamorphic rock

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

Limonite-stained Chert

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)

Fancy Jasper (Multicolor Agate/Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Common Opal

Hydrated silica (SiO2 " nH2O)

Schist

Mica Schist

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Yellow Chalcedony (common opal or chert variant)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions