Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Metamorphic Minerals
Browse sedimentary and metamorphic minerals specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Quartz
SiO2 (Silicon Dioxide)
mineral
Waterworn Pebble / Quartzite
Metamorphic/Sedimentary rock fragment
sedimentary
Gneiss (likely Granitic Gneiss)
Gneiss
metamorphic
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist (Metamorphic rock)
metamorphic
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Limonite pseudomorph after pyrite
Goethite / Limonite pseudomorph after Pyrite (Fe3+O(OH) replacing FeS2)
mineral
Gneiss with Quartz Vein
Metamorphic Gneiss
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Gneiss
Gneiss
metamorphic
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Mica Schist
Schist (Mica-rich Metamorphic Rock)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Gneiss
Gneiss
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Dark gray rounded river pebble
Likely basalt or fine-grained volcanic rock; exact identification requires testing
igneous
Gneiss
Gneiss
metamorphic