Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Quartz-veined Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz grains)
sedimentary
Granite
Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)
igneous
Quartz Vein in Pelite (Metamorphic Rock)
Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Likely gneiss (banded metamorphic rock)
Felsic-to-intermediate gneiss; exact mineral identification requires closer examination
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Orbicular Rhyolite (Rainforest Jasper)
Orbicular Rhyolite
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Quartzite Pebble
Metamorphic Rock (composed mainly of SiO2)
metamorphic
Moonstone
Adularia (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Sandstone
Arenite (primarily Quartz Sandstone with Iron Oxide)
sedimentary
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Sandstone (SiO2 predominant)
sedimentary
Garnet-bearing metamorphic rock, possibly garnet amphibolite or mica schist
Almandine garnet (Fe₃Al₂Si₃O₁₂) in a mafic, amphibole–feldspar-rich matrix
metamorphic
Vesicular Basalt
Basalt (Mafic volcanic rock)
igneous
Gneiss
Gneiss
metamorphic
Conglomerate
Conglomeratic Sandstone
sedimentary
Banded green stone, likely serpentinite
Serpentinite (rock composed chiefly of serpentine-group minerals; exact identification requires testing)
metamorphic
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Tumbled quartz-rich stone, likely milky quartz or quartzite
Quartz (SiO₂), possibly quartzite if composed of interlocked quartz grains
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Dark green metamorphic rock, likely serpentinite
Serpentinite, composed mainly of serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and minor chlorite/talc
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Likely blue-gray slate
Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz
metamorphic
Greenstone
Greenschist (Greened Metabasalt)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Granite
Phaneritic Plutonic Felsic Rock
igneous
Brecciated Jasper
SiO2
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite
Plutonic felsic igneous rock
igneous
Serpentinite pebble
Serpentinite, composed mainly of serpentine-group minerals (commonly antigorite, lizardite, or chrysotile)
metamorphic