Polished serpentine pebble
Serpentinite, chiefly serpentine-group minerals (chrysotile, lizardite, antigorite)
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
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Polished serpentine pendulum
Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Greenschist
Chlorite schist
metamorphic
Greenstone
Chlorite schist / Meta-basalt
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Yellow Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Greenschist
Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)
metamorphic
Schist
Mica Schist
metamorphic
Schist
Mica Schist
metamorphic
Shale / Mudstone
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Shale (or Mudstone)
Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Greenschist / Greenstone
Greenschist facies metabasite
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Schist
Schist
metamorphic
Milky Quartz (Micro-specimen)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Biotite-rich schist (mica schist)
Mica schist; predominantly biotite mica, quartz, and feldspar
metamorphic
Nuummite
Orthoamphibole (Gedrite-Anthophyllite series)
metamorphic
Mica Schist
Schist (primarily Muscovite and Biotite mica)
metamorphic
Serpentine
Serpentinite (group of hydrous magnesium iron phyllosilicate minerals, e.g., Lizardite, Antigorite)
metamorphic
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
metamorphic
Verde Antique Marble (Serpentinite)
Serpentinite (composed mainly of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Lapis Lazuli
Lapis Lazuli (Complex rock primarily composed of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Serpentinite
Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)
metamorphic
Serpentine
Antigorite, Lizardite, or Chrysotile; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Greenstone / Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentine (New Jade)
Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Serpentine
Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Labradorite (or Plagioclase Feldspar Pebble)
(Ca,Na)(Al,Si)4O8
mineral
Granite cobble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Seraphinite
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
mineral
Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
mineral
Serpentinite (likely serpentine-rich metamorphic rock)
Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly derived from altered peridotite
metamorphic
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic