Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral Specimen
Browse mineral specimen specimens identified by the Rock Identifier community.
Learn about Mineral Specimen in the encyclopedia
View all →
Limonite
FeO(OH)·nH2O
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin
gemstone
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Smoky Quartz with Feldspar
SiO2 (Quartz) with KAlSi3O8 (Feldspar)
mineral
Jasper with Quartz vug
Microcrystalline quartz (SiO2)
sedimentary
Desert Rose / Ironstone Concretion
Hematite-cemented quartz concretion
sedimentary
Desert Rose (Gypsum Rosette)
Gypsum (CaSO4·2H2O)
mineral
Quartz (White/Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony with Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicon Dioxide with Crocidolite inclusions (SiO2)
gemstone
Desert Rose
Gypsum or Baryte rosette (CaSO4·2H2O or BaSO4)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Quartz with Tourmaline
Silicon Dioxide (SiO2) with Schorl (NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Limonite
FeO(OH)•nH2O
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Amethyst
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartzite with Pyrite
Metamorphic Quartz-Rich Rock with FeS2
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Agate in Host Rock
Silicon dioxide (Chalcedony/Quartz) within limestone or volcanic matrix
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar group (Oligoclase or Labradorite), Na(AlSi3O8) to Ca(Al2Si2O8)
mineral
Amethyst
Quartz (SiO2)
mineral
Likely muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Turquoise (small rough fragment)
Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Aquamarine in Matrix
Beryl (Be3Al2Si6O18)
gemstone
Green Jasper with Quartz
Microcrystalline Quartz (SiO2)
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Limonite
FeO(OH)•nH2O
mineral
Amethyst
Quartz (SiO2)
gemstone
Amethyst Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Quartz (SiO2)
gemstone
Quartz Cluster
Silicon Dioxide (SiO2)
mineral