Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)

Green serpentine (likely serpentine-rich stone)

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

Tumbled green stone, likely serpentine

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile)

Serpentine (Infinite Stone)

Serpentinite (Hydrous magnesium iron silicate)

Polished dark green stone, likely serpentine

Serpentinite; chiefly serpentine-group minerals, approximately Mg₃Si₂O₅(OH)₄

Serpentine-rich metamorphic cobble

Serpentinite, principally antigorite/lizardite Mg3Si2O5(OH)4, possibly with magnetite and minor carbonate

Serpentine (likely antigorite-rich serpentinite)

Serpentine-group minerals, chiefly antigorite [(Mg,Fe)₃Si₂O₅(OH)₄]

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and chrysotile, with possible magnetite and accessory minerals

Green Gneiss

Metamorphic Gneiss

Likely magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a mafic host rock

Likely serpentine or serpentinite

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

Banded Gneiss

Metamorphic Gneiss

Epidote and Quartz in Basalt

Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt

Nephrite Jade

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

Banded Gneiss

Gneiss (Metamorphic Rock)

Feldspar

Potassium Feldspar (KAlSi3O8)

Banded Gneiss / Metamorphic River Pebble

Gneiss (Foliated Metamorphic Rock)

Red garnet crystal (possible almandine)

Garnet group; likely almandine, Fe₃Al₂(SiO₄)₃

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Nephrite Jade

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

Quartz vein in dark metamorphic rock

Likely quartz-rich vein cutting a biotite- or amphibole-rich metamorphic host; exact host rock cannot be confirmed from the image

Likely garnet (rough crystal)

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); identification from the image is uncertain

Schist

Schist (Metamorphic Rock)

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Schist

Schist

Banded Gneiss

Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Polished green stone, likely aventurine or jade

Most likely green aventurine quartz (SiO₂) or nephrite jade (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); image alone cannot distinguish them

Gneiss (Pebble)

Gneiss

Polished greenstone (likely serpentine or nephrite-like material)

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

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss

Gneiss (Metamorphic Rock)

Polished green stone, likely serpentine or nephrite jade

Serpentine-group minerals (commonly antigorite/lizardite) or nephrite, a fibrous tremolite–actinolite aggregate

Green serpentine

Serpentine-group minerals, chiefly lizardite and antigorite; approximate formula Mg₃Si₂O₅(OH)₄

Likely garnet-bearing rock or almandine garnet fragment

Garnet group, probably almandine (Fe₃Al₂(SiO₄)₃)

Tumbled yellow-green stone, likely serpentine or nephrite jade

Serpentine-group mineral, commonly antigorite/lizardite; possible nephrite, a tremolite–actinolite amphibole aggregate

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Polished dark-green stone, possibly serpentine or nephrite jade

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

River Stone (possibly Gneiss)

Metamorphic Gneiss

Likely dark green-gray metamorphic pebble

Indeterminate; possibly chlorite schist, serpentinite, or amphibolite

Likely garnet (rough crystal)

Garnet group; possibly almandine, (Fe₃Al₂(SiO₄)₃)

Foliated Gneiss

Gneiss (Metamorphic Rock)

Serpentine

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