Schist
Mica Schist
Category
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Schist
Mica Schist
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
Mica Schist
Schist (Biotite/Muscovite rich)
Schist
Mica Schist
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Schist
Crystalline Metamorphic Rock (Schist)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Mica Schist with Quartz
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Serpentine (Serpentinite)
Mg3Si2O5(OH)4
Mica schist
Mica schist (Muscovite and Biotite group)
Mica Schist
Mica Schist (contains Muscovite/Biotite, Quartz)
Aventurine
Aventurine Quartz (SiO2)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Jasper (specifically Oolitic or Brecciated Jasper)
Silicon Dioxide (SiO₂)
Unakite
Altered Granite (Epidotized Feldspar with Quartz)
Jasper
Silicon Dioxide (SiO2) with impurities
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
Rounded volcanic pebble
Likely basaltic-andesite or altered basalt; exact identification requires testing
Yellow-brown river pebble
Likely iron-stained quartzite or chert; exact identification requires testing
Mixed polished river stones
Likely quartz, quartzite, chert/jasper, and possibly limestone or marble
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Yellow Jasper
Silicon Dioxide (SiO2) with goethite/iron oxide inclusions
Red Jasper
Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)
Red Jasper
Microcrystalline quartz (SiO2) with Hematite (Fe2O3) impurities
Red Jasper
Silicon Dioxide (SiO2) with impure Iron oxides
Red Jasper (Chert)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Carnelian
Carnelian (Silicon Dioxide, SiO2)
Yellow Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO₂)
Chalcedony (Quartz Pebble)
Cryptocrystalline Quartz (SiO2)
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Unakite
Altered Granite (Epidotized Granite)
Green Aventurine (Double-Terminated Wand)
Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)
Green Aventurine
Aventurine Quartz (SiO2)
Serpentinite (likely serpentinized ultramafic rock)
Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and relict olivine/pyroxene
Milky quartz (possibly quartz-rich vein rock)
Quartz, silicon dioxide (SiO₂)
Botryoidal Quartz
Silicon Dioxide (SiO2)