Metamorphic Rock (Composed Of Multiple Minerals)

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Unakite

Unakite; epidote–pink feldspar–quartz rock

Quartzite Pebble

Quartzite (mostly SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Pale green-gray stone, possibly serpentinite

Serpentinite (rock composed mainly of serpentine-group minerals)

Banded gneiss

Foliated quartz–feldspar gneiss, likely with mica

Likely muscovite-bearing mica schist

Mica schist, composed mainly of quartz and mica (muscovite and/or biotite)

Greenstone / Greenschist

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Muscovite Schist

Metamorphic rock primarily composed of quartz and muscovite mica

Mixed beach gravel and sand

Unsorted siliciclastic sediment, chiefly quartz and rock fragments

Orange Calcite (likely polished specimen)

Calcite

Chlorite-rich schist (probable greenschist)

Chlorite–quartz–mica schist; commonly derived from basalt or shale under greenschist-facies metamorphism

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Weathered sandstone or metasedimentary rock

Quartz-rich sandstone; possibly weakly metamorphosed quartzite

Likely graphite-rich schist

Graphite-bearing schist, composed mainly of graphite with possible mica and quartz

Quartz Pebble

Silicon Dioxide (SiO2)

Mica-rich metamorphic rock (likely mica schist)

Mica schist, composed mainly of muscovite and/or biotite with quartz and possibly feldspar

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Unakite

Unakite (Metasomatized Granite)

Granite Gneiss

Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Banded gneiss pebble

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

Weathered greenstone (probable)

Greenstone; likely altered mafic rock composed chiefly of chlorite, epidote, and albite

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Marble

Metamorphic Limestone (CaCO3)

Mixed River Stones and Minerals

Mixed Silica-rich Stones (Quartz, Agate, Jasper, Sandstone, Dalmation Stone)

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Schist (likely mica schist)

Mica schist, commonly quartz–muscovite/biotite schist

Quartz-rich rock, likely quartzite

Quartzite, composed predominantly of quartz (SiO₂)

Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)

Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage

Aventurine

Silicon Dioxide (SiO2) with inclusions

Likely amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Mixed stream gravel and common rock specimens

Predominantly quartz-rich granitoid, quartzite, sandstone, shale/slate, and mafic volcanic fragments; exact species cannot be determined confidently from the image

Greenstone

Metabasalt (composed of chlorite, epidote, and actinolite)

Quartz-rich metamorphic rock, likely milky quartz or quartzite

Quartz (SiO₂); possibly quartzite composed predominantly of recrystallized quartz

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

Serpentinite

Serpentinite, composed chiefly of serpentine-group minerals (e.g., antigorite, lizardite, chrysotile)

Likely mica-rich schist

Mica schist, composed mainly of muscovite and/or biotite with quartz and feldspar

Weathered quartz-mica schist

Quartz–muscovite/biotite schist, locally iron-oxide stained

Quartzite River Cobble

Quartzite (SiO2)