Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Man Made Material (Metal)
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Turquoise color-bead and Hematite necklace
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Soapstone (Steatite)
Steatite (Hydrous magnesium silicate)
metamorphic
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Granite
Granite (felsic intrusive igneous rock)
igneous
Pyrite
Pyrite (FeS2)
Mineral
Galena
Lead sulfide (PbS)
mineral
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Native Copper
Copper (Cu)
mineral
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Granite Pebble
Granite
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Phaneritic Igneous Rock
igneous
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
igneous
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite and Tiger's Eye
K(Li,Al)3(Si,Al)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz/Tiger's Eye)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Native Copper
Native Copper (Cu)
mineral
Gold Nugget
Native Gold (Au)
mineral
Banded Calcite (Onyx Marble)
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Pyrite-bearing Rock
Iron Sulfide (FeS2) associated with host rock
mineral
Amethyst Cluster
Silicon Dioxide (Quartz variety: Amethyst) - SiO2
mineral
Gold
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Ferruginous Sandstone (ironstone)
Sandstone with iron oxide cement (limonite/hematite)
sedimentary
Native Copper
Native Copper (Cu)
mineral
Lepidolite in Quartz (Lithium-bearing Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)
igneous/mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Aura Quartz (Coated Quartz)
Silicon Dioxide (SiO2) coated with vaporized metals
mineral
Chert / Flint
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
fossil