Metamorphic Or Igneous Alteration

Soapstone (Talc-Schist)

Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Unakite

Altered Granite (Epidotized Granite)

Serpentine

Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4

Unakite

Epidotized Granite

Unakite (Epidote in Feldspar/Quartz)

Unakite (composed of Epidote {Ca2(Al,Fe)3(SiO4)3(OH)}, Orthoclase {KAlSi3O8}, and Quartz {SiO2})

Serpentine

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

Serpentinite

Serpentinite ((Mg, Fe, Ni)3Si2O5(OH)4)

Stichtite in Serpentine (Atlantasite)

Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4

Tumbled green stone, likely serpentine or aventurine

Serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or quartz-rich aventurine; exact identification requires testing

Tiger’s-eye

Chatoyant quartz (SiO₂), commonly pseudomorphic quartz after crocidolite

Banded Serpentinite (Beach Pebble)

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

Tumbled greenstone-like pebble

Likely serpentine or chlorite-rich metamorphic rock; exact identification requires testing

Serpentine

Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)

Polished dark green stone pendant, likely serpentine or nephrite jade

Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite (microcrystalline tremolite–actinolite)

Polished serpentine-rich stone (likely serpentine jade/“new jade”)

Serpentinite; chiefly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile, with possible magnetite and carbonate

Likely greenish serpentine or soapstone fragment

Serpentine-group minerals, commonly antigorite/lizardite; possibly talc-rich steatite

Quartz with Epidote / Serpentine (Vein Quartz)

SiO2 (Quartz) with Ca2(Al,Fe)3(SiO4)3(OH) (Epidote)

Yellow Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Granite with Epidote / Unakite precursor

Plutonic igneous rock composed of Quartz, Feldspar, and Epidote/Chlorite

Epidote and Quartz in Basalt Porpohyry

Epidote bearing Porphyritic Basalt with Quartz Veins

Kaolinite (Chalky Clay)

Kaolinite (Al2Si2O5(OH)4)

Serpentine

Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe)3Si2O5(OH)4

Serpentine

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

Epidote in Quartz

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Quartz (SiO2)

Serpentine Jade (New Jade/Olive Jade)

Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite

Charoite

Charoite; (K,Sr,Ba,Ca)15-16(Na,Ca)8(Si,Al)24O60(OH,F)4·nH2O

Epidote (likely Pistacite in Epidosite rock)

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

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Serpentine (serpentinite)

Serpentine-group minerals, chiefly antigorite, lizardite, and chrysotile: Mg₃Si₂O₅(OH)₄

White Jade (Nephrite)

Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2

Weathered granitic rock (likely granite or granodiorite)

Granite–granodiorite; chiefly quartz, feldspar, and mica/amphibole

Unakite

Altered Granite (Epidote-bearing Granitic Rock)

Unakite

Altered Granite

Unakite

Altered Granite (Granitic Metamorphic Rock)

Serpentine (Nephrite-like Serpentine)

Serpentinite (Hydrous magnesium iron phyllosilicate)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Unakite

Unakite (altered granite)

Serpentinite (with Pyrite/Garnet inclusions)

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4

Serpentine

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

Tumbled greenstone (likely serpentine or nephrite)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; possibly nephrite, a fibrous amphibole aggregate

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile-group minerals