Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Man Made Material (Metal)
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz - SiO2)
sedimentary
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Bismuth
Bismuth (Bi)
mineral
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Diamond
Carbon (C)
gemstone
Sunstone
Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8
mineral
Granite
Felsic Intrusive Igneous Rock
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Gold Nugget / Flake
Native Gold (Au)
mineral
Diamond (set in a eternity ring band)
Carbon (C)
gemstone
Flint
Silicon Dioxide (SiO2) - Chert variety
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Amethyst (in jewelry)
Silicon Dioxide (SiO2) with iron impurities
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Copper Ore with Chalcocite
Copper sulfide (Cu2S) with associated copper-bearing minerals
mineral
Chalcopyrite (or Pyrite Ore)
CuFeS2 (Copper Iron Sulfide)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Bauxite
Bauxite (mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))
sedimentary
Granite
Intrusive Igneous Rock
igneous
Silver Nugget
Native Silver (Ag)
mineral
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Dyed Blue Agate Druzy Pendant
Quartz / Chalcedony (SiO2) with artificial color treatment
gemstone
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock (Mainly Quartz, Feldspar, and Mica)
igneous
Galena
Lead(II) sulfide (PbS)
mineral
Gold Nugget
Native Gold (Au)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Uncertain small metallic-looking mineral/rock fragment
Indeterminate; possibly galena-bearing rock or metallic slag
mineral
Gossan (with Limonite and Hematite)
Gossanous iron-oxide rock (Fe2O3 · nH2O)
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary