Mineral (Chalcedony Variety)

Sandstone (Glacial Cobble)

Arenite / Sedimentary Rock (primarily SiO2)

Milky Quartz (river pebble)

Quartz (Silicon Dioxide, SiO2)

Chert (and Limestone)

Chert (consisting of Microcrystalline Quartz, SiO2)

Jadeite

Jadeite (NaAlSi2O6)

Peridot (Olivine)

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Chert (variations include Chalcedony and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Yellow Quartz (Citrine/Yellow Chalcedony)

Silicon Dioxide (SiO2)

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Vesicular Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock)

Tourmaline (Schorl or Dravite) on Matrix

Complex Borosilicate - Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH,F)4

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Rose Quartz

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

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz

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

Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (Silicon Dioxide) - SiO2

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Quartz (Yellow/Citrine variety)

Crystalline Silicon Dioxide (SiO2)

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Pyrite

Pyrite (FeS2)

Banded Chert

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

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

Citrine Quartz

Silicon Dioxide (SiO2)

Diorite (Gneissic)

Diorite

Chert

Chert (microcrystalline quartz)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)