Igneous, Sedimentary, And Metamorphic

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Sand

Silicon Dioxide (SiO2)

Greenschist

Chlorite schist

Greenschist

Chlorite schist

Gneiss with Quartz Vein

Metamorphic Gneiss

Pyrite

Pyrite (Iron Disulfide), FeS2

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Magnetite / Iron Ore

Magnetite (Fe3O4)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Gneiss

Foliated Metamorphic Rock

Gneiss

Gneiss (Metamorphic rock)

Gneiss

Gneiss (Metamorphic high-grade)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Biotite Schist

Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

River Cobble (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneissic/Schistose)

Quartz

Silicon Dioxide (SiO2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Pyrite

Iron Disulfide (FeS2)

Green Schist

Greenschist (Chlorite Schist)

Banded Gneiss

Gneiss (SiO2 enriched metamorphic rock)

Green Mica Schist

Mica Schist (Fuchsite or Chlorite variety)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss

Biotite Schist

Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)

Gneiss

Gneiss

Foliated Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Foliated Metamorphic Gneiss

Gneiss

Gneissic Metamorphic Rock

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Magnetite (Loadstone candidate)

Iron(II,III) oxide (Fe3O4)

Epidote-bearing Rock / Epidote Inclusion

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock

Hematite

Iron Oxide (Fe2O3)

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)