Mica Schist with Quartz
Crystalline Schist (SiO2 + KAl2(AlSi3O10)(OH)2)
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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Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Quartz-veined Metamorphic Rock
Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)
metamorphic
Banded River Rock with Quartz Vein
Siltstone/Greywacke with Quartz (SiO2)
sedimentary
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
sedimentary
Granite
Granite
Igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite
Granite
igneous
River Pebble (Gneiss or Granite)
Metamorphic Rock (likely Gneiss or Granitic composition)
metamorphic
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Turquoise
Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)
Mineral
Potassium Feldspar (Microcline)
KAlSi3O8
mineral
Iron (Hematite variety)
Iron (Fe) / Hematite (Fe2O3)
mineral
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Actinolite (likely fibrous amphibole)
Actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; possibly an actinolite–tremolite specimen
mineral
Granite
Granite (a felsic intrusive igneous rock)
Igneous Rock
Pink Himalayan Salt Rock
Halite (NaCl with trace iron oxide minerals)
mineral
Basalt River Stone with Mineral Crust
Aphanitic Mafic Igneous Rock
igneous
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Weathered granitic rock fragment
Granite, predominantly quartz–feldspar–mica assemblage
igneous
Banded Rhyolite (likely Green Jasper/Agate variety)
Silicon Dioxide (SiO2) with mineral inclusions
igneous
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
igneous, sedimentary, metamorphic, mineral
Zebra Jasper
Silicified sedimentary rock (SiO2) with mineral inclusions
sedimentary
Granite fragment
Granite (Felsic Plutonic Rock)
igneous
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Diorite or Granodiorite Pebble
Intermediate Phaneritic Igneous Rock
igneous
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Citrine
Silicon Dioxide (Quartz variety), SiO2
mineral
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Granite
Felsic Plutonic Igneous Rock
igneous
River Pebble
Quartzite / Weathered Sedimentary Rock
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Porphyritic Basalt or Diabase
Mafic igneous rock with porphyritic texture
igneous
Sand
Siliciclastic sediment / Quartz sand (SiO2)
sedimentary