Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic, And Mineral
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Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Polished fossil coral
Fossilized coral, commonly agatized coral (silica replacing CaCO₃)
fossil
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Banded gneiss
Foliated silicate rock, typically quartz–feldspar–mica gneiss
metamorphic
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Milky quartz in weathered host rock
Quartz, SiO₂; likely a quartz vein in altered country rock
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Banded Gneiss (Metamorphic Rock)
metamorphic
Banded gneiss
Gneiss, commonly quartz–feldspar–biotite gneiss
metamorphic
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Yellow-orange quartz/chalcedony pebble (possibly citrine-bearing)
Quartz, SiO₂; likely microcrystalline chalcedony with iron staining
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Likely mica schist
Mica-rich schist, probably biotite–quartz–feldspar schist
metamorphic
Gneiss
Gneiss
metamorphic
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Likely magnetite (small rough crystal)
Magnetite, Fe₃O₄
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Quartz
Quartz (SiO2)
Mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Tumbled metallic-gray stone, likely hematite or magnetite
Hematite (Fe₂O₃) or magnetite (Fe₃O₄); exact identification requires testing
mineral