Schist
Metamorphic rock (Schist)
metamorphic
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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Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite with Chlorite Bands
Meta-quartzite with Chlorite (Mg,Fe,Li)6AlSi3O10(OH)8
metamorphic
Tumbled banded gneiss
Quartz–feldspar–mica gneiss
metamorphic
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Igneous
Weathered sandstone boulder
Quartz-rich sandstone, likely arkose or lithic sandstone
sedimentary
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Weathered Sandstone or Siltstone
Sedimentary Rock
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Mica-rich schist (likely mica schist)
Mica schist, composed mainly of muscovite and/or biotite mica with quartz and feldspar
metamorphic
Weathered granitic rock fragments
Granite, likely quartz–feldspar–mica aggregate
igneous
Quartzite pebble with iron staining
Quartzite, composed mainly of recrystallized quartz (SiO₂)
metamorphic
Mixed river pebbles and quartz-rich specimens
Polymictic fluvial gravel; likely quartz, quartzite, chert, and weathered feldspathic rocks
sedimentary
Polished granite pebble
Granite, a quartz–feldspar plutonic rock
igneous
Lapis Lazuli
Lapis Lazuli (Metamorphic rock primarily composed of Lazurite, Calcite, and Pyrite)
rock
Weathered quartz-rich metamorphic rock, likely milky quartz or quartzite
Quartz (SiO₂), possibly quartzite with iron-oxide staining and dark inclusions
metamorphic
Quartzite Pebble
Quartzite (composed primarily of SiO2)
metamorphic
Rounded basaltic cobble
Basalt, likely amygdaloidal or fine-grained mafic volcanic rock
igneous
Foliated Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Dalmatian Stone
Dalmatian Stone (Felsic Igneous Rock)
igneous
Tumbled granite, likely orbicular or graphic granite
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/amphibole
igneous
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
sedimentary
Dalmatian Jasper
Peralkalic Quartz-Feldspar Porphyry
igneous
Likely mica-rich schist
Mica schist, composed mainly of quartz and mica (muscovite and/or biotite)
metamorphic
Dalmatian Stone
Dalmatian Stone (a fine-grained igneous rock, often misidentified as Dalmatian Jasper)
igneous
Red Sandstone
Arenite (Fe2O3 rich)
sedimentary
Quartzite (Beach Pebble)
Quartzite (composed primarily of SiO2)
metamorphic
Diorite
Intermediate Intrusive Igneous Rock
igneous
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
mineral
Bivalve Fossil (Shell-bearing Sedimentary Rock)
Class Bivalvia (Phylum Mollusca) within a Calcarenite/Sandstone matrix
fossil
Small red-brown mineral or rock fragment
Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide
mineral
Greenstone (likely chlorite-rich metamorphic rock)
Greenschist; commonly composed of chlorite, actinolite, and epidote, with possible albite
metamorphic
Sandstone
Arenite
sedimentary
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartz with Mica / Chlorite Inclusion
Silicon Dioxide (SiO2) with Phyllosilicate minerals
metamorphic
Granite
Intrusive Felsic Igneous Rock
igneous
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Igneous
Siltstone River Rock
Siltstone (composed of silt-sized particles, silicate minerals)
sedimentary
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic