Almandine Garnet
Iron aluminum silicate - Fe3Al2(SiO4)3
metamorphic
Category
Metamorphic (Modified)
Browse metamorphic (modified) specimens identified by the Rock Identifier community.
Pink Jade (Dyed Quartzite)
Silicon Dioxide (SiO2) - primarily Quartzite or Quartz
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
metamorphic
Iolite (Cordierite)
Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
mineral
Dyed Agate
SiO2 (Silicon Dioxide)
Mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon dioxide (SiO2)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Agate
Agatized Chalcedony (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Sapphire (Rough Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Green Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Sugar variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicon dioxide (SiO2) - Pseudomorph after crocidolite
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz Crystal Point
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Yellow Jade
Jadeite or Nephrite (various silicates)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral