Sedimentary

Ironstone Concretion (Nutstone)

Ironstone (with High Limonite/Hematite Content)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Carnelian (Carnelian Agate)

Silicon dioxide (SiO2) - a variety of Chalcedony

Clear Quartz

Silicon dioxide (SiO2)

Gold

Native Gold (Au)

Biotite Schist

Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Honey Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Bornite

Bornite (Cu5FeS4)

Unidentifiable Rock Fragment

Uncertain

Chert / Flint Nodules in Limestone

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Optical Calcite

Calcium Carbonate (CaCO3)

Aragonite (Sputnik habit)

Aragonite (Calcium Carbonate, CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Jasper

Silicon dioxide (SiO2) with impurities

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Mineral

Celestite (Celestine)

Strontium sulfate (SrSO4)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Mineral within Sedimentary Rock

Chalcedony in Limestone Host Rock

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Pink Chalcedony

Silicon Dioxide (SiO2)

Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Limonite and Goethite

Limonite (hydrated iron(III) oxide-hydroxide) and Goethite (α-FeO(OH))

Quartz

Silicon Dioxide (SiO2)

Ruby in Zoisite

Anyolite (Ruby in Zoisite)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Biotite composition)

Flint (within Limestone matrix)

Silicon dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2) with impurities

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2)

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)