Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Category
Igneous And Metamorphic
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Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Mixed Mineral Collection (with Titanium Aura Quartz)
Silicon Dioxide (SiO2) with metallic coatings and various silicates
mineral
Citrine or Yellow Quartz
Quartz (SiO2) with iron impurities
mineral
Gold
Native gold (Au)
mineral
Tumbled Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Rock Crystal)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Hematite
Hematite (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz in Siltstone or Feldspar
Silicon Dioxide (SiO2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Likely milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Likely milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Likely polished dark metallic mineral specimen
Indeterminate from image; possibly hematite, magnetite, or galena
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Small rounded mineral/rock fragment
Indeterminate; possibly quartz-rich stone or feldspar
mineral