Rough Diamond
Diamond (Native Carbon), C
Category
Browse mineral (metal) specimens identified by the Rock Identifier community.
Rough Diamond
Diamond (Native Carbon), C
Milky Quartz
Silicon Dioxide (SiO2)
Rough Diamond
Diamond (pure Carbon, C)
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Diamond
Native Carbon (C)
Quartz pebble
Silicon dioxide (SiO2)
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
Diamond (in jewelry setting)
Diamond (Carbon, C)
Pink Tourmaline (Rubellite)
Rb:Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite variety)
Quartz Pebble
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
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
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Pink Granite
Phaneritic Felsic Igneous Plutonic Rock
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
Granite
Granite (High-silica plutonic rock)
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
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
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Diamond
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)
Ruby
Corundum (Al2O3) with Chromium traces
Dragon Vein Agate
Chalcedony (Quartz) - SiO2
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
Petrified Wood
Silicified Wood (primarily SiO2)