Sedimentary Or Igneous (Host Environment)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite

Sandstone

Arenite (primarily SiO2)

sedimentary (microcrystalline silicate)

Red Jasper (River-worn Pebble)

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Red Sandstone

Arenite (with Iron Oxide)

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)

Petrified Wood

Silicon Dioxide (SiO2) permineralized organic matter

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Gold-bearing Quartz

Lode Gold in Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Dalmatian Jasper

Aplite with Arfvedsonite inclusions

igneous

River Rock (Basalt/Greywacke)

Aphanitic Basalt or Lithic Sandstone (Greywacke)

igneous

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Serpentinite

Serpentinite (complex silicate of magnesium, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

igneous

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Quartz (Float/Abraded)

Quartz (SiO₂)

Mineral

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Banded Calcite (often sold as Mexican Onyx)

Calcium Carbonate (CaCO3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz

SiO2 (Silicon Dioxide)

Quartz (Small Grains)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

White Agate (Chalcedony)

Chalcedony (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Biotite Mica

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)