Bismuth
Bismuth (Bi)
mineral
Category
Non Geological
Browse non geological specimens identified by the Rock Identifier community.
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Generic Rock Fragment
Rock Fragment
sedimentary
Quartz in Greenstone
Metamorphic rock with quartz vein (SiO2 / mixed silicates)
metamorphic
Sandstone Concretion
Sedimentary Concretion (Quartz sand bound by mineral cement)
sedimentary
Sedimentary Rock Fragments
Clastic Sedimentary Rock
sedimentary
Vein Quartz in Basalt or Mafic Rock
Silicon Dioxide (Quartz veins in volcanic host rock)
igneous
Amygdaloidal Basalt (or Orbicular/Vesicular Basalt)
Basalt with quartz/agate amygdules
igneous
Fossilized Plant or Tree Bark
Lepidodendron or Sigillaria (example genera)
sedimentary
Undetermined Due to Blur (Possible Flesh-Tone Mineral)
Unknown (Insufficient Visual Clarity)
Mineral
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Fossiliferous Sandstone Pebble (with Crinoid / Shell Impression)
Sandstone containing fossiliferous inclusions (SiO2 matrix with calcite/silica cast fossil)
sedimentary
Porphyry pebble
Porphyritic Andesite / Porphyry
igneous
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
sedimentary
Fossilized Shark Tooth (Sand Tiger)
Carcharias taurus (fossil specimen)
sedimentary
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common)
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Iron-rich quartzite or ironstone
Ferruginous quartzite; predominantly quartz (SiO₂) with hematite/goethite (Fe₂O₃/FeO(OH))
metamorphic
Gneiss
Gneiss
metamorphic
Slag (Industrial Glass/Metal Waste)
Artificial silicate/ferro-silicate byproduct
Mineraloid (Industrial byproduct)
Amber
Fossilized Tree Resin (Succinite)
mineraloid
Granite
Phaneritic Plutonic Felsic Rock
igneous
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Pyrite
Iron disulfide (FeS2)
mineral
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veins in metamorphic/igneous host rock
igneous
Unidentified Rock Fragment
Unknown
Rock
Quartz Crystal
Silicon dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral