Unakite
Unakite (metamorphosed granitic rock)
metamorphic
Category
Sedimentary Rock (Metamorphosed)
Browse sedimentary rock (metamorphosed) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Metamorphosed) in the encyclopedia
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Greenstone Pebbles (Basalt/Diabase)
Metamorphosed Mafic Rock (Greenstone)
metamorphic
River Stone (Quartzite/Siltstone)
Metamorphosed Siliciclastic Rock (SiO2)
metamorphic
Greenstone with Quartz Veining
Metamorphosed Mafic Igneous Rock
metamorphic
Greenstone
Greenschist (Metamorphosed Mafic Rock)
metamorphic
Greenstone / Greenschist
Greenschist (metamorphosed mafic rock)
metamorphic
Greenstone / Greenschist
Greenschist (metamorphosed mafic rock)
metamorphic
Greenstone (Diabase or Metabasalt)
Metamorphosed Mafic Igneous Rock
metamorphic
Greenstone / Quartzite Pebble
Metamorphosed Quartz-rich Rock
metamorphic
Unakite
Unakite (metamorphosed granite)
metamorphic
Unakite
Unakite (Metamorphosed granite)
metamorphic
Mica-rich metamorphic rock, likely schist
Muscovite- or biotite-bearing schist; composition commonly quartz + mica ± feldspar
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Fossiliferous shale or slate with plant impressions
Carbonaceous mudstone/shale; possible fossil plant material (often fern-like impressions)
fossil
Quartz-bearing reddish metamorphic rock, possibly ferruginous quartzite or jasper vein
Quartz (SiO₂) with iron oxides; likely quartzite or iron-rich jasper
metamorphic
Veined Quartzite Pebble (Heart-Shaped)
Metamorphosed quartz-rich sandstone with quartz veins
sedimentary
Rounded river pebble, likely quartz-rich sandstone or weathered quartzite
Tentative: quartz arenite (sandstone) or quartzite; chiefly SiO₂
sedimentary
Quartzite
SiO2 (Metamorphosed Sandstone)
metamorphic
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Weathered quartz-rich rock, likely sandstone or quartzite
Quartz-dominated lithic fragment; probable quartz sandstone (SiO₂)
sedimentary to metamorphic
Weathered iron-rich sandstone or ferruginous quartzite
Ferruginous sandstone; possibly hematite/goethite-cemented quartzite
sedimentary
Rounded reddish-brown pebble
Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Tumbled brown river stone
Likely weathered iron-rich basalt, greenstone, or other mafic metamorphic rock; exact identification requires testing
metamorphic
Quartzite Cobble
Metamorphosed Sandstone (SiO2)
metamorphic
Quartzite
SiO2 (Metamorphosed Sandstone)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Gneiss (Metamorphosed Pebble)
Gneiss with Quartz/Feldspar banding
metamorphic
Polished Marble (likely Carrara-type with Iron oxides)
Metamorphosed Carbonate (CaCO3)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Quartzite with Chlorite/Epidote
Metamorphosed Quartzite (SiO2)
metamorphic
Weathered sandstone or metasedimentary rock
Quartz-rich sandstone; possibly weakly metamorphosed quartzite
sedimentary
Quartzite with Milky Quartz Vein
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Rounded river pebble, likely quartz-rich sandstone or weathered quartzite
Indeterminate; probable quartz (SiO₂)-rich clastic rock
sedimentary
Quartzite Pebble
Metamorphosed Quartz (SiO2)
metamorphic
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone
metamorphic
Quartzite Pebble
Si02 (Metamorphosed Sandstone)
metamorphic
Quartzite Pebble
Metamorphosed Sandstone (SiO2)
metamorphic
Quartzite
Metamorphosed Sandstone (SiO2)
metamorphic