Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
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Amazonite
Potassium feldspar (Microcline) - K(AlSi3O8)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with trace Fe2+)
Mineral
Green Tourmaline (Verdelite)
Elbaite (Complex Borosilicate: Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Amazonite
Potassium Feldspar (Microcline) - K(AlSi3O8)
Mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Emerald
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Basalt
Extrusive mafic igneous rock
igneous
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Obsidian
Volcanic glass (Mainly SiO2)
igneous
Granite Gneiss River Rock
Gneiss
Metamorphic
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Igneous
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Amazonite
Potassium Feldspar (KAlSi3O8), specifically Microcline
mineral
Amazonite
Microcline (KAlSi3O8, a variety of Potassium Feldspar)
mineral
Tourmaline (Schorl or Dravite) on Matrix
Complex Borosilicate - Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH,F)4
mineral
Watermelon Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Granitic Pegmatite with Tourmaline and Sphalerite
Pegmatite containing Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) and Sphalerite ((Zn,Fe)S)
igneous
Granitic Pegmatite with Tourmaline
Granite (Feldspar/Quartz matrix) with Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
igneous
Gneiss
Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)
metamorphic
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))
mineral
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous
Smoky Quartz on Feldspar (Granite Pegmatite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
igneous
Amazonite in Pegmatite Matrix with Smoky Quartz
K(AlSi3O8) - Microcline (var. Amazonite) with SiO2 (Quartz)
Mineral
Amazonite
Amazonite / Microcline (KAlSi3O8)
igneous
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral