Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Category
Metamorphic (Modified)
Browse metamorphic (modified) specimens identified by the Rock Identifier community.
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Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Slate
Foliated metamorphic rock
metamorphic
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Veined quartz-bearing metamorphic rock
Likely quartzite or siliceous schist with iron-oxide staining
metamorphic
Pink-red faceted gemstone, possibly synthetic corundum or spinel
Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)
gemstone
White quartz pebble (probable)
Quartz, silicon dioxide (SiO₂)
mineral
Ruby in Zoisite (Anyolite)
Ruby-Zoisite
metamorphic
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusions of AlAl6BSi3O18
mineral
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)
metamorphic
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Specular Hematite
Specularite (Fe2O3)
mineral
Ruby cabochons
Corundum, aluminum oxide (Al₂O₃), colored red by chiefly chromium
gemstone
Raw Emerald (Emerald Beryl)
Beryl (Be3Al2Si6O18) with chromium/vanadium impurities
mineral
Tumbled jade-like stone, likely jadeite or nephrite
Jadeite (NaAlSi₂O₆) or nephrite, a fibrous amphibole aggregate
mineral
Polished/tumbled rhodonite-rich stone
Rhodonite (MnSiO₃), likely mixed with quartz and manganese oxides
metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Likely garnet (rough crystal)
Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain
mineral
Fossilized marine shell fragment
Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)
fossil
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Rounded dark metamorphic pebble
Likely mica schist or chlorite-rich greenschist; exact identification requires testing
metamorphic
Fuchsite
Chromium-rich Muscovite Mica
mineral
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Garnet in Matrix
Almandine or Pyrope Garnet (X3Y2(SiO4)3) in Schist or Eclogite matrix
metamorphic
Kyanite
Kyanite, Al₂SiO₅
mineral
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) within Quartz (SiO2)
igneous
Quartz pebble
Silicon dioxide (SiO2)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Pink Quartz
Silicon Dioxide (Quartz), SiO2
mineral
Aquamarine in Onyx / Blue Topaz Pendant
Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)
gemstone