Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Red Aventurine
Aventurine Quartz (SiO2 + Hematite/Goethite)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Red Sandstone (Old Red Sandstone)
Ferruginous Sandstone (SiO2 + Fe2O3)
sedimentary
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Quartzose)
Sandstone (Principally SiO2)
sedimentary
Slate
Slate (foliated metamorphic rock)
metamorphic
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO₂)
metamorphic
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Basalt
Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine
Igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Crushed Stone / Gravel (Multiple Rock Types)
Lithic fragments (undifferentiated)
Igneous, Sedimentary, and Metamorphic mix
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Slate
Slate (foliated metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Sandstone
Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)
sedimentary
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Greenstone
Greenschist (Greened Metabasalt)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Sandstone
Arenite
sedimentary
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Sandstone
Arenite (primarily composed of SiO2 - Silicon Dioxide)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Sandstone (likely Arkosic or Lithic Sandstone)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Sandstone (Red Sandstone)
Arenite (predominantly SiO2 with Fe2O3 cement)
sedimentary
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based with cement)
sedimentary