Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Metal)
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Granite
Intrusive Igneous Rock
igneous
Quartz and Limestone Grouping
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
mineral
Granite
Felsic intrusive igneous rock
igneous
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
igneous
Granite
Granite (felsic intrusive igneous rock)
igneous
Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Slag
Anthropogenic Vitrification Product / Silicate Slag
Anthropogenic (Man-made industrial byproduct)
Iron Slag
Anthropogenic Vitreous Ferrous Silicate
industrial byproduct (anthropogenic)
Quartz-bearing Ore (likely Gold-bearing Quartz)
Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)
mineral/hydrothermal
Granite
Felsic intrusive igneous rock
igneous
Iron-rich meteorite fragment (probable)
Unclassified meteoritic iron–nickel or stony-iron fragment
meteorite
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granite
Intrusive Igneous Rock
igneous
Copper Ore
Mixed copper sulfides/oxides in gangue matrix
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Amethyst (in jewelry)
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8
mineral
Granite
Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase
igneous
Granite
Felsic intrusive igneous rock
igneous
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Silver Nugget
Native Silver (Ag)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Gold Nugget
Native Gold (Au)
mineral
Granite
Felsic intrusive igneous rock
igneous
Lepidolite with Rubellite Tourmaline
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite mica)
mineral
Mixed gemstone jewelry collection
Likely amethyst, rose quartz or pink tourmaline, smoky quartz, and dark tourmaline/onyx; exact identifications are uncertain from the image
gemstone
Ironstone Pebble
Sedimentary ironstone / Hematitic Sandstone
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
not a natural rock
Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
The user-provided image does not contain a rock or mineral specimen
N/A
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Bismuth
Bismuth (Bi)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral