Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Category
Igneous, Sedimentary, Metamorphic, And Mineral
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Pyrite
Iron Sulfide (FeS2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Quartz (Clear or Cloudy)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Schist
Schist (Foliated Metamorphic Rock)
metamorphic
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Graphite
Graphite (Carbon, C)
mineral
Fuchsite (Green Muscovite / Mica Schist)
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milk or Clear Variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gravel / Crushed Stone
Aggregate (mixed mineral rock fragments)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gold Mineral
Native Gold (Au)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Blue apatite (likely rough/tumbled specimen)
Apatite group, commonly fluorapatite — Ca5(PO4)3F
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic