Tumbled greenstone (likely serpentinite or altered basalt)
Serpentinite, predominantly serpentine-group minerals; exact identification requires testing
Category
Browse mineral group specimens identified by the Rock Identifier community.
Tumbled greenstone (likely serpentinite or altered basalt)
Serpentinite, predominantly serpentine-group minerals; exact identification requires testing
Tumbled greenstone, likely serpentinite
Serpentinite (predominantly serpentine-group minerals: Mg₃Si₂O₅(OH)₄)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals such as Antigorite, Lizardite, and Chrysotile)
Likely greenstone (serpentinized rock)
Serpentinite, predominantly serpentine-group minerals [Mg₃Si₂O₅(OH)₄]
Tumbled greenstone (likely serpentine)
Serpentinite; mainly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
Native Silver
Silver (Ag)
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
Fine-grained dark metamorphic rock, likely slate or phyllite
Slate/phyllite, composed mainly of mica-group minerals, quartz, and clay-derived minerals
Slate
Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz
Serpentinite (probable)
Serpentinite, dominated by serpentine-group minerals (chrysotile, lizardite, or antigorite), commonly with magnetite
Likely serpentinite (serpentine-rich rock)
Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from ultramafic peridotite
Bivalve Fossil (Cockle shell)
Class Bivalvia (e.g., Anadara or Veneridae family)
Tumbled green stone, possibly serpentine or prehnite
Provisional identification: serpentine-group mineral, commonly antigorite; alternatively prehnite or green calcite
Green serpentine or nephrite jade fragment
Serpentine-group minerals, commonly antigorite/chrysotile; possibly nephrite (interlocking tremolite-actinolite)
Tumbled serpentine
Serpentine-group minerals, chiefly antigorite and lizardite; commonly Mg₃Si₂O₅(OH)₄
Tumbled pale-green stone, likely serpentine or green aventurine
Probably serpentine-group minerals, chiefly lizardite/antigorite; exact identification requires testing
Tumbled blue-green stone, likely aventurine or serpentine
Quartz-rich aventurine (SiO₂) or serpentine-group mineral; exact identification requires testing
Tumbled green jasper or serpentine
Likely serpentine-group mineral, chiefly magnesium silicate; possibly epidotized or altered jasper
Polished dark-green stone, possibly serpentine or nephrite jade
Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite (actinolite–tremolite amphibole)
Serpentine-bearing schist (likely chlorite–talc schist)
Ultramafic-derived greenschist; serpentine-group minerals, chlorite, talc, and possibly actinolite
Serpentinized ultramafic rock (likely serpentinite)
Serpentinite; chiefly serpentine-group minerals, with possible magnetite, olivine, pyroxene, and talc
Tumbled pale green aventurine or chalcedony
Quartz-group silica, primarily microcrystalline SiO₂; possible fuchsite-bearing aventurine
Raw tourmaline crystal (probable schorl)
Tourmaline group; likely schorl, NaFe3+Al6(BO3)3Si6O18(OH)4
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
Labradorite (Dark or Black variety)
Labradorite (member of Plagioclase Feldspar group), (Na,Ca)(Si,Al)4O8
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
Polished bronzite-bearing serpentine (probable)
Serpentinite, chiefly serpentine-group minerals with bronzite/orthopyroxene and magnetite inclusions
Likely greenstone (serpentine or altered jade-like rock)
Serpentinite, chiefly serpentine-group minerals; exact identification requires testing
Dark green-black stone, likely serpentinite
Serpentinite; chiefly antigorite/lizardite/chrysotile group minerals, commonly with magnetite
Polished serpentine (likely)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄
Tumbled serpentine (likely)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄
Serpentine (likely bowenite)
Serpentine-group minerals, chiefly antigorite and lizardite; often with magnetite and carbonate
Verde Antique Marble (Serpentinite)
Serpentinite (composed mainly of Serpentine group minerals, Mg3Si2O5(OH)4)
Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
Moonstone
Orthoclase Feldspar (specifically showing adularescence)
Sunstone (variety of Feldspar)
Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8
Serpentine
Antigorite/Chrysotile group (Mg3Si2O5(OH)4)
Mudstone
Lutylite (group of fine-grained sedimentary rocks)