Metamorphic (Low Grade)

Greenstone / Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Actinolitic Schist

Serpentine

Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4

Green Schist

Greenschist (Chlorite Schist)

Greenstone (metamorphosed basalt)

Greenschist / Meta-basalt

Slate

Metamorphic pelitic rock

Slate

Metamorphic mudstone or shale

Greenschist (Greenstone)

Chlorite Schist / Greenschist Facies Rock

Weathered foliated metamorphic rock, likely schist or phyllite

Micaceous quartz–feldspar schist/phyllite; exact identification requires microscopy or testing

Likely slate or fine-grained metamorphic rock

Slate; predominantly microcrystalline quartz, mica, and clay minerals

Likely slate fragment

Slate; fine-grained foliated metamorphic rock, commonly quartz–mica–chlorite rich

Greenschist

Greenschist (Chlorite-actinolite schist)

Jadeite Bead

Jadeite NaAlSi2O6

Rough Sapphire (possibly Yellow/Green Corundum)

Corundum (Al2O3)

Greenschist

Chlorite Schist (Greenschist Facies)

Greenstone

Greenschist / Greenstone (Chlorite-Epidote facies)

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Slate

Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Greenstone (Greenschist)

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Greenshist / Chlorite Schist

Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Pyrite

Iron Disulfide (FeS2)

Jadeite

NaAlSi2O6

Greenstone

Metamorphic mafic rock (greenschist facies)

Fine-grained greenish-gray rock fragment

Likely greenschist (chlorite–actinolite–epidote assemblage); exact identification requires testing

Greenstone / Serpentinite

Serpentine-group / Altered Mafic Rock

Milky Quartz with Talc / Serpentine

Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2

Greenstone

Chlorite schist or Epidosite

Slate

Foliated Metamorphic Rock (composed mainly of clay minerals or micas)

Greenstone (likely altered basalt)

Greenschist-facies metabasalt; commonly composed of chlorite, actinolite, epidote, and albite

Likely greenstone (chlorite/epidote-altered basalt), waterworn pebble

Greenschist-facies metabasalt; commonly composed of chlorite, actinolite, epidote, and albite

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Epidote

Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))

Serpentinite (or Green Quartz Pebble)

Mg3Si2O5(OH)4 (Serpentine group) / SiO2 (Quartz mix)

Banded Slate (Lithified Mudstone)

Low-grade Metamorphosed Mudstone / Slate

Lemon Quartz

Silicon dioxide (SiO2) with iron inclusions

Jasper Veined Greenstone

Metamorphosed mafic volcanic rock with quartz-jasper vein

Fuchsite

Muscovite (chromium-rich), K(Al,Cr)2(AlSi3O10)(OH)2

Greenstone

Metabasalt / Metavolcanic rock

Greenstone

Metabasalt / Chlorite-actinolite-epidote schist

Serpentine (Serpentinite)

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe)2O5(OH)4)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)