Non Geological

Chert (specifically Flint)

Chert (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Pyrite

Iron Sulfide (FeS2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Aquamarine

Beryl (Be3Al2Si6O18)

Fuchsite (Green Muscovite in Quartz)

K(Al,Cr)2(AlSi3O10)(OH)2 - Chromium-rich Muscovite

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Clear Quartz

Silicon Dioxide (SiO2)

Granite

Phaneritic Felsic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)

Milky Quartz

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Bumble Bee Jasper

Volcanic Tuff (mixture of SiO2, CaCo3, S, and As2S3)

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS)

Native Gold (in Jewelry)

Gold (Au)

Quartz

Silicon dioxide (SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ impurities)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Celestine (Celestite)

Strontium Sulfate (SrSO4)

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Pumice

Pumice (a volcanic glass, primarily SiO2 with Al2O3)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz-Veined Mudstone

Argillaceous Mudstone with Quartz Veining

Petrified Wood

Silicified Wood (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Oolite or Oolitic Limestone

Oolitic Limestone (Principal mineral: Calcite, CaCO3)

Amygdaloidal Rhyolite

Amygdaloidal felsic extrusive rock