Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Category
Browse mineral (treated) specimens identified by the Rock Identifier community.
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Moonstone
Adularia (orthoclase) or Albite (plagioclase), a feldspar mineral (KAlSi3O8 or NaAlSi3O8 respectively, often a mixture)
Green Tourmaline
Verdelite (Silicate mineral); Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Red Jasper
Red Jasper (variety of Chalcedony, SiO₂)
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Pyrite
Iron Sulfide (FeS2)
Rose Quartz
Rose Quartz (SiO2)
Aquamarine with Sunstone
Aquamarine (Be3Al2Si6O18), Sunstone (Na,Ca)Al(Si,Al)Si2O8
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Quartz (Variety: Rose Quartz/Smoky Quartz mix)
Silicon Dioxide (SiO2)
Pegmatitic Granite
Granite (Alkali-feldspar granite) with Quartz and Orthoclase
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Diamond
Diamond (pure Carbon, C)
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
Black Sapphire
Corundum (Al2O3 with inclusions of hematite or ilmenite)
Eudialyte in Matrix
Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3
Ruby
Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
Ruby
Corundum (Al2O3) with Chromium traces
Petrified Wood
Silicified Wood (primarily SiO2)
Gneiss
High-grade metamorphic rock (Gneiss)
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
Bauxite
Bauxite (Principal ore of aluminum; mixture of minerals including Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Diamond
Natural Carbon (C)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Milky Quartz
Silicon Dioxide (SiO2)
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
Rough Dark Green Sapphire
Corundum (Al2O3)
Amethyst
Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Amethyst (Chevron/Dream Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Mookaite Jasper
Silicified radiolarite (SiO2)