Mineral Group

Tumbled dark green stone, likely serpentine

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

Tumbled dark stone, possibly serpentinite

Serpentinite (serpentine-group minerals; commonly Mg₃Si₂O₅(OH)₄)

Serpentine (Serpentinite)

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

Amphibolite (likely)

Amphibolite, composed mainly of hornblende-group amphibole and plagioclase feldspar

Likely serpentinite (rough green serpentinite rock)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, and chrysotile)

Polished greenstone (likely serpentine or altered basalt)

Serpentinite, chiefly serpentine-group minerals; possible chlorite/actinolite-bearing greenstone

Serpentine

Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)

Tumbled yellow-green stone, likely serpentine

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

Polished white-green serpentine pebble

Serpentine-group minerals, chiefly antigorite or lizardite; commonly sold as “new jade”

Gastropod Fossil

Phylum Mollusca, Class Gastropoda (Calcium Carbonate, CaCO3)

Tumbled green-brown stone, likely serpentine

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

Tumbled green stone, likely serpentine

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

Mixed gemstone specimens

Likely pink sapphire or tourmaline, red garnet, blue sapphire, precious opal, and green tourmaline/emerald; exact identities cannot be confirmed from the collage

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Brachiopod Fossil

Brachiopoda (Phylum); often Atrypa or Mucrospirifer genus depending on locality

Blue-green serpentinite (likely copper-stained)

Serpentinite; chiefly serpentine-group minerals, commonly with malachite/chrysocolla or other copper minerals

Probable fossilized coral

Fossil coral; exact coral group and species cannot be determined from the image

Gray volcanic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and minor olivine/iron oxides

Yellow chalcedony or citrine-like polished stone

Chalcedony (microcrystalline quartz, SiO₂), possibly dyed or artificially illuminated; exact identification is uncertain from the image

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Tumbled brown tourmaline (likely dravite)

Tourmaline-group mineral; probably dravite, NaMg₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Quartz with Chlorite inclusions

Silicon Dioxide (SiO2) with Chlorite group minerals (hydrous magnesium iron alumino-silicate)

Polished green banded stone, likely serpentine or altered greenstone

Probable serpentinite/greenstone; commonly dominated by serpentine-group minerals, chlorite, epidote, or actinolite

Polished greenstone (likely serpentine or nephrite-like material)

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

Polished orbicular granite (likely larvikite or gabbroic granite)

Granite-group rock; chiefly feldspar, quartz, and dark pyroxene/amphibole minerals

Basalt Pebble

Basalt

Serpentinite (serpentinized ultramafic rock)

Serpentine-group minerals, chiefly lizardite and antigorite; commonly derived from peridotite

Likely polished green serpentine or aventurine

Serpentine-group minerals, commonly antigorite/lizardite; alternatively quartz-rich green aventurine

Basalt Pebble

Basalt

Tumbled green-blue stone, likely serpentine or aventurine

Serpentine-group minerals, chiefly antigorite/lizardite; possible quartz-rich green aventurine

Likely raw serpentine or green calcite specimen

Tentatively serpentine-group mineral, commonly antigorite or lizardite; alternatively pale green calcite

Green serpentine-rich stone

Serpentine-group minerals, chiefly antigorite/lizardite; possibly nephrite or chlorite-bearing rock

Likely green aventurine or serpentine fragment

Quartzite with fuchsite inclusions (aventurine), or serpentine-group mineral; exact identification requires testing

Likely polished green aventurine or serpentine pebble

Quartz-rich aventurine (SiO₂) or serpentine-group mineral; exact identification requires testing

Mixed rock and mineral specimen collection

Varied silicate, carbonate, and oxide minerals; individual identification is not possible from this group photograph

Yellow-green aventurine or serpentine pendant

Most likely serpentine-group mineral (magnesium silicate), possibly quartz-rich aventurine

Tumbled green stone, likely serpentine or green jasper

Probable serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or microcrystalline quartz/chalcedony

Tumbled serpentine (likely)

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

Greenstone / serpentinized rock

Serpentinite, commonly dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)

Tumbled dark green stone, likely serpentine or greenstone

Serpentinite (serpentine-group minerals), possibly chlorite- or amphibole-rich greenstone

Rounded greenish metamorphic rock, likely serpentinite

Serpentinite, composed mainly of serpentine-group minerals (antigorite, lizardite, or chrysotile)

Greenstone (likely serpentinite or altered basalt)

Serpentinite, chiefly serpentine-group minerals; exact identification requires testing