Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Processed Metal)
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Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Moss Agate
Silicon dioxide (SiO2) with inclusions
Mineral
Granite
Intrusive Igneous Rock
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gossan (Limonite/Goethite)
Hydrated iron oxides (primarily FeO(OH)·nH2O)
mineral
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Jasper
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Carnelian cabochon earrings
Carnelian, a translucent orange variety of chalcedony (microcrystalline SiO₂)
gemstone
Sandstone (Whetstone/Sharpening Stone)
Siliciclastic Sandstone (SiO2 dominant)
sedimentary
Native Copper
Native Copper (Cu)
mineral
Polished raw copper-bearing rock, likely cuprite–malachite ore
Copper oxides and carbonates, likely cuprite (Cu₂O) with malachite (Cu₂CO₃(OH)₂); exact identification requires testing
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Chalcedony (likely carnelian/agate beads or rounded grains)
Microcrystalline quartz, SiO₂; chalcedony varieties
mineral
Gossan (Iron Cap)
Limonitic Gossan (Fe2O3·nH2O mixed)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Porphyritic Basalt or Porphyritic Andesite
Porphyritic Extrusive Igneous Rock
igneous
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Granite and Porphyry Pebbles
Intrusive Igneous Rock
igneous
Red Sandstone
Quartz Arenite (with Iron Oxide)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chromite
Chromite (FeCr2O4)
mineral
Granite
Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase
igneous
Milky quartz crystal
Quartz, silicon dioxide (SiO₂), likely a small prismatic crystal or crystal fragment
mineral
Quartz–calcite sulfide-bearing mineral specimen
Quartz (SiO₂) with likely calcite (CaCO₃) and iron sulfides, possibly pyrite (FeS₂); exact species requires testing
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Mica-rich metamorphic rock, likely schist
Quartz–mica schist; commonly quartz with muscovite and/or biotite mica
metamorphic