Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Metamorphic, Sedimentary
Browse igneous, metamorphic, sedimentary specimens identified by the Rock Identifier community.
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Greenschist
Greenschist (composed mainly of actinolite/tremolite, chlorite, and epidote)
metamorphic
Dalmatian Stone
Peralkaline rhyolite
igneous
Greenstone (Greenschist)
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Dalmation Stone (often called Dalmatian Jasper)
Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite
igneous
Muscovite Mica (in Quartz matrix)
Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral
Garnet and Quartz
Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)
mineral
Biotite Schist
Biotite Schist (Metamorphic Rock featuring K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Pyrite
Pyrite (FeS2)
Mineral
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Mineral
Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
metamorphic
Milky Quartz (Water-worn pebble/nodule)
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz with Talc / Serpentine
Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2
metamorphic
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex silicate mineral mix including Lazurite, Pyrite, and Calcite)
metamorphic
Greenstone
Chlorite schist or Epidosite
metamorphic
Milky Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
gemstone
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Epidote with Unakite characteristics
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
metamorphic
Likely quartz cluster with iron staining
Quartz (SiO₂), possibly with calcite or feldspar inclusions
mineral
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (Microcline / Orthoclase, KAlSi3O8)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Quartz (Iron-stained River Pebble)
Silicon Dioxide (SiO2)
mineral
Feldspar (Plagioclase / Orthoclase)
KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Smoky Quartz with possible inclusion
Silicon Dioxide (SiO2)
mineral
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Black Tourmaline
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Serpentine (Serpentinite)
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Moonstone (Feldspar)
Orthoclase Feldspar KAlSi3O8 / Albite NaAlSi3O8
gemstone
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral