Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Yellow Aventurine
Quartz containing Muscovite or Mica inclusions (SiO2)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide - NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Dumortierite Quartz (Blue Quartz)
Al7(BO3)(SiO4)3O3 / Quarz with Dumortierite inclusions
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
New Jade (Serpentine)
Antigorite / Serpentine Group (Mg3Si2O5(OH)4)
metamorphic
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Chakra Stone Bracelet (mixed gemstones)
Multi-mineral/Gemstone assembly (primarily Quartz variety beads)
mineral
Pyrite in Shale
Iron Sulfide (FeS2)
mineral
Banded Agate
Agate (Silicon Dioxide / SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
igneous
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Muscovite Mica (with Quartz matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
metamorphic
Raw Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite)
metamorphic
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Yellow Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg, Fe)5Si8O22(OH)2; Jadeite: NaAlSi2O6
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
metamorphic
Grey Banded Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Serpentine
Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4
metamorphic
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Pink Tourmaline (Rubellite)
Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar
mineral
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Agate
Cryptocrystalline Quartz (SiO2)
mineral
Amazonite
Potassium aluminum silicate (KAlSi3O8)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Jasper (Red and Yellow)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary