Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Schist
Schist (Crystalline Metamorphic Rock)
metamorphic
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz-rich metamorphic rock, likely mica schist or quartzite
Quartz (SiO₂) with probable mica, feldspar, and dark accessory minerals
metamorphic
Black Tourmaline (Tumbled)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
gemstone
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Mica Schist
Schist (Crystalline metamorphic rock)
metamorphic
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss / Metamorphic River Pebble
Gneiss (Foliated Metamorphic Rock)
metamorphic
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Banded metamorphic rock, likely gneiss or schist
Foliated quartz–feldspar–mica rock; exact identification requires a closer view or mineral testing
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist, possibly with quartz and feldspar
metamorphic
Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly quartz (SiO₂), with minor feldspar, mica, and iron-oxide staining
metamorphic
Serpentine Sphere
Serpentinite
metamorphic
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Quartz-rich rock, likely milky quartz or quartzite
Quartz (SiO₂), possibly quartzite with minor feldspar and iron-oxide staining
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Eclogite
Eclogite (Omphacite + Pyrope)
metamorphic
Black tourmaline (schorl)
Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Slate
Metamorphic pelitic rock
metamorphic
Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Banded Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Uncertain gray metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica rock; exact identification requires close examination
metamorphic
Pyrite-bearing metamorphic rock (likely pyrite schist or quartz–pyrite ore)
Pyrite (FeS₂) in a quartz–mica-rich matrix; exact host rock is uncertain from the image
metamorphic
Raw quartz (milky quartz), possibly iron-stained
Quartz, silicon dioxide (SiO₂), trigonal crystal system
mineral
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Tumbled quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled and polished quartz crystal points
Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties
mineral
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Quartz-veined Granite or Gneiss Pebble
Silicate-rich metamorphic rock fragment
metamorphic
Quartz-veined metamorphic rock, likely quartzite or schist
Quartz-rich metamorphic rock with a milky-quartz vein; exact host rock is indeterminate from the photo
metamorphic
Grey Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Weathered schist
Mica schist, typically quartz–mica schist
metamorphic
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly quartz (SiO₂), with minor feldspar, mica, and iron-oxide staining
metamorphic
Banded gneiss
Gneiss, likely biotite–quartz–feldspar gneiss
metamorphic