Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
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Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
mineral
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Galena-bearing sulfide ore
Galena (lead sulfide, PbS), possibly mixed with pyrite or other sulfides
mineral
Likely galena-bearing ore
Galena (lead sulfide, PbS), possibly mixed with quartz or other sulfides
mineral
White Quartz
Quartz (SiO2)
Mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Rough Citrine Quartz
Citrine (Silicon Dioxide, SiO2 with iron impurities)
mineral
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Basalt Pebble
Aphanitic Igneous Rock
igneous
Garnet (likely Almandine or Pyrope)
Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3
mineral
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Mica Schist
Schist (Mica-rich Metamorphic Rock)
metamorphic
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Osumilite in Granite Matrix
(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Unakite Epidote-Granite
Unakite (Epidotized Granite)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Mineral
Basalt (Weathered River Pebble)
Extrusive Igneous Rock
igneous