Mica Schist
Mica-rich Schist containing Muscovite and Quartz
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
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Nuummite
Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
metamorphic
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Greenschist
Chlorite schist
metamorphic
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Basalt Pebble
Extrusive Igneous Rock
igneous
Schist (with Iron Oxide)
Mica Schist
metamorphic
Nuummite
Antigorite-Anthophyllite complex
metamorphic
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Amphibolite
Amphibolite
metamorphic
Greenstone with Quartz Veining
Metamorphosed Mafic Igneous Rock
metamorphic
Greenschist
Chlorite schist
metamorphic
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
metamorphic
Turquoise (Dyed Howlite/Magnesite)
CuAl6(PO4)4(OH)8·4H2O (Natural Turquoise) or Ca2B5SiO9(OH)5 (Howlite)
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Chrysocolla on Quartz/Rhyolite matrix
Hydrated copper phyllosilicate mineral: (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Fire Agate (Rough)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Blue Apatite
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Greenstone / Greenschist
Metamorphosed mafic igneous rock (Greenschist facies)
metamorphic
White Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Greenstone Porphyry
Altered Porphyritic Andesite/Basalt
igneous
Blue Chalcedony (Moonstone-like / Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
gemstone
Rough Chalcedony / Jasper Nodules
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Rough Diamond
Natural Diamond (Carbon, C)
mineral
Boulder Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Turquoise (Dyed Howlite or Magnesite imitation)
Hydrated phosphate of copper and aluminum / CuAl6(PO4)4(OH)8·4H2O
mineral
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Sapphire
Corundum (Al2O3)
mineral
Muscovite Schist with Quartz
KAl2(AlSi3O10)(OH,F)2 (Muscovite) in Schist
metamorphic
Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Serpentine
Serpentinite (Mg, Fe)3Si2O5(OH)4
metamorphic
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic