Igneous, Sedimentary, Or Metamorphic (Mineral Based)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Milky or Citrine-tinted)

Silicon Dioxide (SiO2)

Gneiss

High-grade regional metamorphic rock (Foliated)

Citrine

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Quartz (likely Rose or Smoky variant)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

White Zircon

Zircon (Zirconium silicate, ZrSiO4)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)

Phylum Echinodermata, Class Echinoidea

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Quartz in Matrix

Silicon Dioxide (SiO2)

Sandstone (likely Graywacke or Lithic Sandstone)

Arenite / Wacke (SiO2 based with lithic fragments)

Quartz with Mica (Micaceous Quartz)

Silicon Dioxide (SiO2) with Phyllosilicates

Jasper

Jasper (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (specifically Gray/Tan Bedded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Mica Schist with Iron Staining

Mica Schist

Quartzite Pebble

Quartzite (SiO2)

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Chert (specifically Jasper/Flint pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)