Chert
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
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Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Mica Schist
Mica Schist (Muscovite subclass)
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
River Rock (Greywacke/Sandstone)
Lithic Wacke
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Siltstone River Rock
Siltstone (composed of silt-sized particles, silicate minerals)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Quartz with Magnetite or Schorl inclusion
Silicon Dioxide (SiO2) with Fe3O4 or NaFe3(Al6)(BO3)3Si6O18(OH)4
metamorphic
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Basalt
Extrusive Igneous Rock (Mafic)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite cobble
Granite (Felsic Plutonic Rock)
igneous
Porphyritic Basalt
Porphyritic Basalt (Silicate Rock)
igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Diorite (Dalmatian Stone variant)
Intermediate Phaneritic Igneous Rock
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Granite
Phaneritic Granocrystalline Igneous Rock
igneous
Granite
Phaneritic intrusive igneous rock
igneous
Andesite
Intermediate Volcanic Rock (Andesite)
igneous
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (with Epidote and Feldspar/Zeolite infill)
igneous
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic
Hematite
Hematite (Fe2O3)
mineral
Galena
Lead Sulfide (PbS)
mineral
Mica
Muscovite / Biotite (Phyllosilicate group)
mineral
Conglomeratic Sandstone
Clastic Sedimentary Rock
sedimentary