Igneous, Metamorphic, Sedimentary

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz (Ferruginous variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Clear or Cloudy)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Gray/Smoky Varieties)

Silicon Dioxide (SiO2)

Gneiss

Metamorphic Gneiss

Quartz

Silicon Dioxide (SiO2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Graphite

Graphite (Native Carbon), Formula: C

Graphite

Graphite (Carbon, C)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Fuchsite (Green Muscovite / Mica Schist)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss and Igneous Rock Collection

Foliated Metamorphic Rock (Gneiss) / Igneous Rocks

Magnetite-rich ironstone (probable magnetite ore)

Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix

Kaolinite (Kaolin)

Kaolinite (Al2Si2O5(OH)4)

Magnetite (Lodestone)

Iron(II,III) oxide (Fe3O4)

Gneiss (River Cobble)

Metamorphic Gneiss

Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Foliated Metamorphic Rock

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)