Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Category
Mineral (Metamorphic Pseudomorph)
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Galena
Lead Sulfide (PbS)
mineral
Blue Sapphire
Corundum (Al2O3) with iron and titanium impurities
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite
mineral
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Grey Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sapphire
Corundum (Al2O3)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Green Quartz (Prasiolite/Adventurine/Jasper)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon dioxide with aluminum impurities (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Red Aventurine (Strawberry Quartz)
Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite
Mineral
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Plagioclase Feldspar
Plagioclase Feldspar Series (NaAlSi3O8 - CaAl2Si2O8)
Mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of Titanium, Iron, or Manganese
mineral
Amazonite
Microcline (KAlSi3O8) with lead inclusions
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Mica (Muscovite)
Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine (Quartz)
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Limonite-stained Quartzite
Quartzite with Limonite (FeO(OH)·nH2O) staining
metamorphic
Red Quartzite
Quartzite (SiO2)
metamorphic