Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Limonite and Goethite
Limonite (hydrated iron(III) oxide-hydroxide) and Goethite (α-FeO(OH))
mineral
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Man-made material (Anthro-lithic product)
Small metallic meteorite fragment (probable stony-iron or iron meteorite)
Unclassified meteoritic material; exact classification requires chemical and petrographic testing
meteorite
Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Native Copper Nugget
Native Copper (Cu)
mineral
Granite and Porphyry Pebbles
Intrusive Igneous Rock
igneous
Vanadinite
Pb5(VO4)3Cl
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Weathered breccia or hydrothermal vein rock
Silicified polymict breccia, likely quartz–iron-oxide breccia
rock
Lepidolite in Mica Schist
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
metamorphic
Quartz Vein in Matrix (Gneiss/Schist)
Silicon Dioxide (SiO2) in Metamorphic Rock Matrix
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Beryl (Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Whetstone/Sharpening Stone)
Siliciclastic Sandstone (SiO2 dominant)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Milky quartz crystal
Quartz, silicon dioxide (SiO₂), likely a small prismatic crystal or crystal fragment
mineral
Granite
Intrusive Igneous Rock
igneous
Bismuth
Bismuth (Bi)
mineral
Gold Nugget / Flake
Native Gold (Au)
mineral
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Quartz–calcite sulfide-bearing mineral specimen
Quartz (SiO₂) with likely calcite (CaCO₃) and iron sulfides, possibly pyrite (FeS₂); exact species requires testing
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Mica-rich metamorphic rock, likely schist
Quartz–mica schist; commonly quartz with muscovite and/or biotite mica
metamorphic
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Granite Pebble with Quartz Vein
Granite (Plutonic Igneous Rock) with Quartz (SiO2)
igneous
Slate
Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Granite
Intrusive Igneous Rock
igneous
Milky Quartz in Gneiss
Quartzite / Foliated Gneiss containing SiO2
metamorphic
Porphyritic Basalt or Porphyritic Andesite
Porphyritic Extrusive Igneous Rock
igneous