Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite) in the encyclopedia
View all →
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Serpentine (Serpentinite)
Mg3Si2O5(OH)4
metamorphic
Nephrite Jade
Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Mixed mineral and rock collection, including likely amethyst and assorted tumbled stones
Unidentified mixed specimens; visible purple quartz is likely amethyst (SiO₂)
mineral
Unidentified weathered rock fragments
Likely mixed silicate rocks; specific identification requires testing
mineral
Nephrite Jade / Epidote Pebble
Ca2(Mg,Fe)5Si8O22(OH)2 / Ca2Al2Fe3+(SiO4)(Si2O7)O(OH)
metamorphic
Likely tumbled green mineral (possibly serpentine or aventurine)
Indeterminate; possibilities include serpentine-group minerals, nephrite, or green aventurine quartz
mineral
Slate
Foliated Metamorphic Rock
metamorphic
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Tumbled greenstone (likely serpentinite or altered basalt)
Serpentinite, predominantly serpentine-group minerals; exact identification requires testing
metamorphic
Tumbled green stone, likely serpentine or nephrite jade
Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite, a jade variety of tremolite–actinolite
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock predominantly containing quartz, feldspar, and mica)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
metamorphic
Tumbled serpentine
Serpentine-group minerals, chiefly lizardite and antigorite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
metamorphic
Polished operculum (“Shiva eye” shell)
Calcium-carbonate shell operculum, commonly from a turban snail (family Turbinidae); not a mineral specimen
fossil
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Tumbled dark green stone, likely serpentine or nephrite jade
Serpentine-group minerals, chiefly antigorite/lizardite; possibly nephrite, an aggregate of tremolite–actinolite
metamorphic
Banded gneiss
Gneiss, composed mainly of quartz, feldspar, and mica
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Serpentinite
Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)
metamorphic
Probable tumbled garnet
Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)
mineral
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Garnet Gneiss
Gneiss containing almandine-pyrope garnet
metamorphic
Gneiss (Granulite / Foliated Metamorphic Rock)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Serpentine (possibly New Jade)
Serpentine group, Mg3Si2O5(OH)4
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Greenstone (Greywacke or Nephrite Jade variant)
Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)
metamorphic
Gneiss Pebble
Gneiss
metamorphic