Agate
Cryptocrystalline quartz (SiO2)
Mineral
Category
Mineral (Metamorphic Pseudomorph)
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Alexandrite
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz River Pebble (Quartzite)
Metamorphic Quartzite (SiO2)
metamorphic
Clear Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Titanium Quartz (Aura Quartz)
Silicon Dioxide (SiO2) treated with Titanium
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Quartz (Citrine/Milky variety)
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8) with inclusions
mineral
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz (Raw / Unpolished)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Yellow Aventurine (Tumbled)
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz with Fuchsite (or Chlorite)
SiO2 (Silicon Dioxide) with K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite)
mineral