Metamorphic Or Igneous Alteration

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Altered Granite (Epidote, Pink Orthoclase Feldspar, and Quartz)

Unakite

Altered granite (Epidotized granite)

Unakite

Unakite (Epidotized Granite)

Serpentine

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

Serpentine

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

Quartz-veined altered rock

Likely quartz-bearing metasediment or altered igneous rock; vein mineral: quartz (SiO₂)

Quartz (in a rock matrix)

Quartz (SiO2)

Likely greenstone (metamorphosed basalt)

Greenschist or chlorite–epidote altered basalt; commonly composed of chlorite, epidote, actinolite, albite, and quartz

Tumbled serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; commonly Mg₃Si₂O₅(OH)₄

Serpentinite (probable)

Serpentinite, dominated by serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with dark magnetite or chromite and pale carbonate/talc possible

Polished nephrite jade

Nephrite jade — interlocking amphibole, chiefly tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Tumbled greenstone (likely serpentine or nephrite-like material)

Serpentine-group minerals, commonly antigorite/lizardite; possibly nephrite jade (actinolite-tremolite)

Likely tumbled green mineral (possibly serpentine or aventurine)

Indeterminate; possibilities include serpentine-group minerals, nephrite, or green aventurine quartz

Serpentine (likely serpentinite)

Serpentine-group minerals, chiefly antigorite/lizardite, commonly with magnetite and chlorite

Greenstone / Basalt

Aphanitic Mafic Igneous Rock (Metabasalt)

Polished pink quartzite (likely with chlorite inclusions)

Quartzite; predominantly quartz (SiO₂), with minor chlorite or amphibole inclusions

Tumbled greenstone pebble

Likely serpentinite or greenstone; exact identification requires testing

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Tumbled dark green stone, likely serpentine or nephrite jade

Serpentine-group minerals, commonly antigorite/lizardite; possibly nephrite (interlocking tremolite-actinolite)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Polished pink-and-green feldspar-bearing rock, likely unakite or aventurine granite

Unakite-like epidote–feldspar–quartz aggregate; composition commonly K-feldspar + quartz + epidote

Green serpentine or nephrite-like stone

Serpentine-group minerals, chiefly antigorite/lizardite; possibly nephrite jade (actinolite)

Fuchsite-bearing Quartzite (Green Quartzite)

Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartzite

Rhodonite

Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3

Sodalite

Na8(Al6Si6O24)Cl2

Unakite

Altered Granite (Epidotized Granite)

Serpentine

Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4

Unakite (Epidote with Quartz and Feldspar)

Unakite (Metasomatized Granitic Rock)

Serpentine

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

Ruby

Corundum (Al2O3:Cr)

Rock Fragment with Calcite/Quartz Vein

Polymictic Rock Fragment (SiO2 / CaCO3)

Unakite

Altered Granite (composed of orthoclase feldspar, epidote, and quartz)

Polished pink-and-gray stone, likely rhodonite-bearing rock

Rhodonite (MnSiO₃) in a manganese-rich metamorphic matrix; exact identification requires testing

Thulite in Matrix

Pink Zoisite - Ca2Al3(SiO4)3(OH)

Polished Unakite (likely)

Unakite: quartz + epidote + pink K-feldspar, commonly with minor chlorite

Unakite

Altered Granite (Epidotized Granite)

Unakite (or Polished Jasper Pebble)

Altered Granite (Epidote-Orthoclase Rock)

Unakite Mushroom Carving

Altered Granite (composed of orthoclase feldspar, green epidote, and quartz)

Serpentinite

Serpentinite (Mg3Si2O5(OH)4)

Unakite

Unakite (metasomatized granite)

Serpentine

Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4