Red Quartzite
Quartzite (SiO2)
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
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Green Fluorite
Calcium Fluoride (CaF2)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Selenite / Gypsum
Gypsum (CaSO4·2H2O)
Mineral
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Aquamarine (Beryl) Beads
Beryllium aluminum silicate (Be3Al2Si6O18)
gemstone
Serpentine / Antigorite
Mg3Si2O5(OH)4 (Serpentine Group)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentine
Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Unakite
Epidotized Granite
metamorphic
Gneiss (Metamorphic Rock)
Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)
metamorphic
Biotite Schist
Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Rough Diamond
Diamond (pure Carbon, C)
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Jadeite Bangle
NaAlSi2O6 (Jadeite pyroxene mineral aggregate)
gemstone
Jade Ring
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Yellow Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone
Green Fluorite
Calcium fluoride (CaF2)
mineral
Bismuthinite with Chalcopyrite and Quartz
Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)
mineral
Marble
Metamorphic carbonate rock (primarily CaCO3)
metamorphic
Rough Diamond
Diamond (C)
mineral
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Red Scoria (Lava Rock)
Scoria (Vesicular Basalt)
igneous
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with inclusions
mineral
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Tumbled sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Fairy Stone (Staurolite)
Staurolite (Fe2+2Al9Si4O22(OH)2)
mineral
Schist
Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)
metamorphic
Carnelian (Polished Agate)
Silicon Dioxide (SiO2)
gemstone
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Iron Ore (Magnetite-Hematite)
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Amber
Fossilized Tree Resin
gemstone
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary