Weathered sandstone or metasedimentary rock
Quartz-rich sandstone; possibly weakly metamorphosed quartzite
sedimentary
Category
Metamorphic Rock (Primarily Composed Of Minerals)
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Sandstone
Arenite (major component SiO2)
sedimentary
Likely graphite-rich schist
Graphite-bearing schist, composed mainly of graphite with possible mica and quartz
metamorphic
Dalmation Jasper
Dalmation Stone (perthitic feldspar with arfvedsonite)
igneous
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
sedimentary
Basalt
Extrusive igneous rock primarily composed of plagioclase and pyroxene
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)
metamorphic
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Mica-rich metamorphic rock (likely mica schist)
Mica schist, composed mainly of muscovite and/or biotite with quartz and possibly feldspar
metamorphic
Sandstone Pebble
Sedimentary quartz arenite
sedimentary
Sandstone with Manganese Oxide Patina
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Unakite
Unakite (Metasomatized Granite)
metamorphic
Granite Gneiss
Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)
metamorphic
Sandstone (with garnet granules)
Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)
sedimentary
Turquoise in Matrix
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Banded gneiss pebble
Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole
metamorphic
Granite
Granite
igneous
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Weathered greenstone (probable)
Greenstone; likely altered mafic rock composed chiefly of chlorite, epidote, and albite
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock
igneous
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Serpentine
Serpentinite (composed primarily of Mg3Si2O5(OH)4)
metamorphic
River Stone (composed of Siltstone/Basalt mixture)
Siltstone or microcrystalline Basalt pebble
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Mixed River Stones and Minerals
Mixed Silica-rich Stones (Quartz, Agate, Jasper, Sandstone, Dalmation Stone)
sedimentary
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)
Mineral
Schist (likely mica schist)
Mica schist, commonly quartz–muscovite/biotite schist
metamorphic
Quartz-rich rock, likely quartzite
Quartzite, composed predominantly of quartz (SiO₂)
metamorphic
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Conglomerate
Conglomerate
sedimentary
Greenstone / Greenschist
Greenschist (composed primarily of Chlorite, Epidote, and Actinolite)
metamorphic
Eclogite
Eclogite (composed primarily of Omphacite and Pyrope Garnet)
metamorphic
Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)
Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage
mineral