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

Serpentinite (serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, brucite, and talc

Gneiss

Gneiss

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Slate

Slate (Metamorphic Rock)

Pale green rounded boulder, likely altered serpentinite or greenstone

Probable serpentinized ultramafic rock; exact identification requires testing

Quartzite

Quartzite (SiO2)

Tumbled yellow-green stone, likely serpentine

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄)

Gneiss

Gneiss

Tumbled greenstone/chlorite-rich pebble

Likely chlorite-rich greenschist or altered basalt; exact identification requires testing

Gneiss

Gneiss

Almandine Garnet

Almandine (Fe3Al2Si3O12)

Red garnet crystal cluster

Most likely almandine garnet, Fe₃Al₂(SiO₄)₃; exact species cannot be confirmed from the image alone.

Serpentinite

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

Mixed polished gemstone and mineral collection

Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Serpentinite

Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), with magnetite and relic mafic minerals

Garnet and Quartz

Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)

Gneiss

Gneiss

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Tumbled serpentinite (serpentine stone)

Serpentinite, dominated by serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and chromite

Serpentine

Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Mixed rock and mineral specimen collection

Mostly undetermined from the photograph; apparent quartz-rich rocks, sandstone, granite/gneiss, and possibly iron-oxide-bearing specimens

Greenstone pebble, likely serpentine or altered basalt

Probably serpentinite (serpentine-group minerals, Mg₃Si₂O₅(OH)₄) or chlorite-rich greenschist

Slate

Slate (Foliated Metamorphic Rock)

Quartzite

Metamorphic Rock (Quartzite)

Tumbled greenstone (likely serpentinite or nephrite)

Serpentinite: Mg-rich serpentine minerals; possible nephrite: tremolite–actinolite amphibole

Pink Granite Gneiss

Granitic Gneiss

Greenstone (likely serpentine-rich rock)

Serpentinite, a rock composed mainly of serpentine-group minerals; exact identification is uncertain from the image

Gneiss

Gneiss

Pink Marble

Recrystallized Limestone (Calcium Carbonate, CaCO3)

Dark green mineral specimen, possibly serpentine or epidote

Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Granite Gneiss

Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)

Granitic Gneiss

Gneiss (Polymetamorphic Granitic Gneiss)

Serpentine-rich metamorphic rock (probable serpentinite)

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and chromite

Rhodonite

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

Biotite Mica

K(Mg,Fe)3AlSi3O10(OH)2

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Serpentinite with carbonate and iron-oxide alteration

Serpentinite; chiefly antigorite/lizardite Mg₃Si₂O₅(OH)₄, with magnetite, calcite, and chromian minerals

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)