Amethyst/Smoky Quartz Cluster
Silicon Dioxide (SiO2) with iron and aluminum impurities
mineral
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
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Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Rough Green Tourmaline (Verdelite)
Elbaite (Complex Silicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Kunzite
Spodumene (LiAlSi2O6)
mineral
Lepidolite on Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Lepidolite in Quartz (Lithium-bearing Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)
igneous/mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Titanium, Manganese, or Iron
mineral
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁•H₂O)
Mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Quartz with mica and feldspar (Pegmatite fragment)
Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)
igneous
Ptygmatic Migmatite
Migmatite (consisting of Neosome and Paleosome fractions)
metamorphic
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Coarse-grained Quartz with Feldspar inclusions
Crystalline Quartz (SiO2) with Orthoclase/Plagioclase Feldspar inclusions
igneous
Quartz (specifically Rose or Smoky tinted Quartz)
Silicon Dioxide (SiO2)
mineral
Diorite (River Cobble)
Intrusive Igneous Diorite
igneous
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Quartz (Milky or Cloudy Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Diorite (River Pebble)
Diorite
igneous
Amazonite in Matrix
Potassium Feldspar (Microcline), KAlSi3O8
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Amazonite
K(AlSi3O8) - Potassium aluminum silicate
mineral
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Rough Green Tourmaline (Verdelite)
Elbaite (Complex Borosilicate), Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sunstone
Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Muscovite Mica in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)
mineral
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral
Amazonite
Microcline (KAlSi3O8) with Trace Elements
mineral