Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Tectosilicate)
Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.
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Blue Chalcedony
Chalcedony (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Amazonite
Microcline (KAlSi3O8)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Grey Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Amazonite
Microcline (KAlSi3O8) with Trace Elements
mineral
Green Quartz (Prasiolite variant or Aventurine)
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Amethyst (Quartz)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Moonstone
Orthoclase and Albite (KAlSi3O8 / NaAlSi3O8)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Amazonite
K(AlSi3O8)
mineral
Dendritic Opal
Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Peach Moonstone
Orthoclase (KAlSi3O8)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Sunstone
Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8
mineral
Chrysocolla in Quartz (Quantum Quattro variant)
Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2
mineral
Auriferous Quartz with Pyrite
Gold-bearing Quartz (SiO2 + FeS2 + Au)
mineral
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Quartz with Schist/Mica Inclusions
Crystalline Silicon Dioxide (SiO2) with Phyllosilicates
metamorphic
Paraiba Tourmaline
Elbaite Tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) - Copper-bearing
mineral
Amazonite
Amazonite (KAlSi3O8, a variety of Microcline)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Blue Apatite
Fluorapatite / Ca5(PO4)3F
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
mineral
Gold Ore
Gold-bearing Quartz (Native Gold, Au)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Amethyst
Crystalline Quartz (SiO2 with iron impurities)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Kunzite (Spodumene)
Spodumene (LiAlSi2O6)
mineral
Smoky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst (Rough Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Caribbean Calcite
Calcium Carbonate with Aragonite (CaCO3)
mineral
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)
metamorphic
Chrysocolla in Matrix
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral