Pyrite
Iron Disulfide (FeS2)
mineral
Category
Igneous, Sedimentary, Metamorphic, And Mineral
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Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Pyrite in Matrix (likely Quartz or Schist matrix)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
metamorphic
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Mixed mineral and rock collection
Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones
mineral
Quartz (Milky/Clear Variety)
Silicon Dioxide (SiO2)
mineral
Epidote-bearing Rock / Epidote Inclusion
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Fragment
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Clear fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Polished Jasper / Gneiss (Metamorphic/Siliceous Egg)
Siliceous Gneiss / Banded Metamorphic Rock
metamorphic
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Banded metamorphic rock, likely gneiss or amphibolite
Composition uncertain; probable quartz–feldspar–amphibole assemblage
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic