Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral With Metamorphic Or Igneous Host
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
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Weathered quartz-rich rock, possibly milky quartz in altered host rock
Milky quartz (SiO₂), with probable iron-oxide staining and a fine-grained host matrix
mineral
Quartz-veined metamorphic rock
Likely quartz-veined schist or gneiss; exact identification requires closer examination
metamorphic
Likely black diamond or dark faceted gemstone ring
Uncertain from the photograph; possibly carbon (diamond) or black spinel, set in metal
gemstone
Boxwork Quartz / Septarian Jasper
Boxwork (SiO2 with iron oxide inclusions)
metamorphic
Fluorite on Host Rock
Calcium Fluoride (CaF2)
mineral
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Polished rhodonite
Rhodonite, (Mn,Fe,Mg,Ca)SiO₃
metamorphic
Likely rough blue-gray kyanite
Kyanite, Al₂SiO₅
mineral
Schist
Schist (various compositions)
metamorphic
Black tourmaline (schorl), likely in a crystal aggregate
Schorl, NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Dumortierite in Quartz
Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)
mineral
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Likely black tourmaline (schorl)
Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Nephrite Jade
Nephrite
Mineral/Rock
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Faceted yellow gemstone ring
Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.
gemstone
Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
mineral
Corundum
Corundum (Al2O3)
Mineral
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
metamorphic
Pegmatite
Igneous Pegmatite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Igneous
Granite Pegmatite
Pegmatite (Quartz, Feldspar, Mica)
igneous
Emerald in Matrix
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Dumortierite Quartz
Dumortierite in Quartz (SiO2 with Al7BO3(SiO4)3(O,OH)3)
mineral
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Quartz vein fragment (likely quartz with dark host rock)
Quartz (SiO₂) in an unidentified fine-grained host rock
metamorphic
Quartz Vein in Matrix / Quartzite
Silicon Dioxide (SiO2) with host rock
metamorphic
Greenstone
Metabasalt / Greenschist
metamorphic
Pyrite-bearing rock, possibly pyrite schist or sulfide ore
Pyrite (iron disulfide, FeS₂), likely intergrown with dark metamorphic host minerals
mineral
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral
Milky Quartz in Gneiss
Quartzite / Foliated Gneiss containing SiO2
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Quartz Vein in Gneiss or Basalt
Milky Quartz (SiO2) within Metamorphic Host Rock
Metamorphic or Igneous with Mineral Inclusion
Weathered quartz-bearing rock fragments
Likely quartz (SiO₂) in a weathered iron-stained host rock; exact identification is uncertain from the image
mineral
Wishing Stone (Quartz-veined Porphyritic Basalt)
Igneous rock with quartz vein (SiO2)
igneous