Quartzite with Chlorite/Epidote
Metamorphosed Quartzite (SiO2)
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
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Serpentine
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Beach Pebble (Nephrite Jade / Chalcedony)
Ca2(Mg,Fe)5Si8O22(OH)2 / SiO2
metamorphic
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Greenstone or Epidote-rich rock
Epidote or Chlorite schist/greenstone
metamorphic
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Anthracite Coal
Anthracite (Metamorphic/High-grade Sedimentary Coal)
sedimentary
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Greenstone (River Pebble)
Metabasalt / Greenschist
metamorphic
Slate
Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Anthracite Coal
Anthracite
sedimentary
Anthracite Coal
Low-grade metamorphic carbonaceous rock
metamorphic
Slate with Fossiliferous Impressions
Metamorphosed Argillaceous Rock (Fossiliferous Slate)
metamorphic
Greenstone Pebble
Metabasalt / Greenschist
metamorphic
Jadeite
NaAlSi2O6
mineral
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Greenstone
Metabasalt / Greenschist
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))
mineral
Greenstone
Metabasalts and metavolcanics
metamorphic
Epidote (Greenstone)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
River Cobble (likely Metasedimentary or Basalt)
Metamorphosed Siltstone or Altered Fine-grained Igneous Rock
metamorphic
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
metamorphic
Nephrite Jade
Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Greenstone
Chlorite schist or metabasalt depending on specific composition
Metamorphic
Unidentified River Rock or Mudstone
N/A (Generic rock fragment)
Sedimentary or Metamorphic
Anthracite Coal
Anthracite (Highly Metamorphosed Coal)
sedimentary
Serpentine (Serpentinite)
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Greenstone
Greenschist (containing chlorite, epidote, and actinolite)
metamorphic
Greenstone
Metabasalt / Metamorphosed Igneous Rock
metamorphic
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
metamorphic
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Dark gray foliated metamorphic rock, likely slate or phyllite
Slate/phyllite; commonly quartz, muscovite/illite, chlorite, and graphite or carbonaceous matter
metamorphic
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Quartzite Pebble
Quartzite
metamorphic