Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Category
Mineral (Pseudomorph)
Browse mineral (pseudomorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Pseudomorph) in the encyclopedia
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Sapphire (Faceted)
Corundum (Al2O3)
gemstone
Milky Quartz Chip
Silicon Dioxide (SiO2)
mineral
Green Aventurine
SiO2
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Small quartz-rich pebble
Quartz (SiO₂), possibly quartzite or weathered granite fragment
mineral
Likely weathered quartz-rich stone
Probably quartz-bearing sandstone or milky quartz; exact identification requires testing
mineral
Wollastonite
Calcium Inosilicate, CaSiO3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Aquamarine
Beryl (Be3Al2Si6O18) with trace Iron (Fe2+)
mineral
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Granite
Granite (Intrusive Igneous Rock)
igneous
Basalt with Quartz Vein
Extrusive Igneous Rock / Volcanic Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Gabbro
Plagioclase-pyroxene intrusive igneous rock
igneous
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Granite
Phaneritic Intrusive Igneous Rock (Quartz-Feldspar dominant)
igneous
Basalt with Quartz Vein
Basalt with silicon dioxide (SiO2) inclusion
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granite Pebble
Granite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Sandstone (lithic)
Lithic Wacke / Arenite
sedimentary
Basalt (Black Beach Pebble)
Basalt
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral