Anthropogenic Sedimentary (Man Made)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Chalcedony (specifically Common Opal or Agate variant)

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Ironstone Concretion (Nutstone)

Ironstone (with High Limonite/Hematite Content)

Kyanite (Blue Kyanite)

Kyanite (Al2SiO5)

Halite (Rock Salt)

Halite (NaCl)

Clear Quartz

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Carnelian (Carnelian Agate)

Silicon dioxide (SiO2) - a variety of Chalcedony

Clear Quartz

Silicon dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Jasper

Silicon dioxide (SiO2) with impurities

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Chert / Flint Nodules in Limestone

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Optical Calcite

Calcium Carbonate (CaCO3)

Honey Calcite

Calcium Carbonate (CaCO3)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Biotite Schist

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pink Chalcedony

Silicon Dioxide (SiO2)

Chalcedony in Limestone Host Rock

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Biotite composition)

Flint (within Limestone matrix)

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicified microcrystalline quartz) - SiO2

Ocean Jasper

Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)

Marble (polished)

Recrystallized Calcite (CaCO3)

Jasper Agate (Chalcedony)

Silicon Dioxide (SiO2)

Epidote

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

Pyrite

Iron Sulfide (FeS2)

Amber in Matrix

Succinite (Carbon-based organic polymer)

Chert (often called Jasper or Flint in this color variety)

Silicon Dioxide (SiO2)

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

Jasper

Silicon Dioxide (SiO2) with impurities

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)