Tuff with Quartz and Calcite Veining
Lithic Tuff (Silicified)
igneous
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Schist
Mica Schist
metamorphic
Greenstone
Chlorite schist or metabasalt depending on specific composition
Metamorphic
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Basalt
Basalt (extrusive igneous rock)
Igneous
Pegmatite
Granitic Pegmatite
igneous
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Sedimentary Rock
Orange Quartz / Quartzite
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Charoite
K(Ca,Na)2Si4O10(OH,F) · nH2O
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Banded Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (Muscovite subclass)
metamorphic
Quartz with Mica
SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)
Mineral
Chert (variations include Flint/Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (Actinolite-Chlorite Schist)
metamorphic
Biotite (Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
metamorphic
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt
Aphanitic Mafic Volcanic Rock
igneous
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Aventurine
Silica (SiO2) with inclusions
mineral
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony (River Stone)
Microcrystalline Quartz (SiO2)
mineral
Kidney Stone (Renal Calculus)
Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
mineral