Muscovite Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
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Serpentine
Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Schist
Mica Schist
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (mainly SiO2 with iron oxide impurities)
metamorphic
Mica Schist
Mica Schist
metamorphic
Zoisite with Ruby / Anyolite
Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)
metamorphic
Pyrite-bearing rock, possibly pyrite schist or sulfide ore
Pyrite (iron disulfide, FeS₂), likely intergrown with dark metamorphic host minerals
mineral
Carnelian
Carnelian (variety of Chalcedony, SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Red Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
mineral
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Granite Gneiss
Gneiss (Derived from Granite protolith)
metamorphic
Polished leopard-skin jasper
Leopard-skin jasper; an opaque, microcrystalline quartz-rich rock, commonly with iron-oxide and volcanic/mineral inclusions
metamorphic
Serpentine
Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe)3Si2O5(OH)4
metamorphic
Schist
Schist
metamorphic
Serpentine
Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Greenschist
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Serpentine
Antigorite/Chrysotile/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Chert / Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Rounded white pebble, likely quartz or feldspar
Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image
mineral
Tumbled quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Goethite pseudomorph after Pyrite
Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)
mineral
Serpentine
Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4
metamorphic
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Yellow Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Fossil shark tooth
Likely fossilized shark tooth, possibly *Carcharocles* or *Otodus* species
fossil
Unidentified Rock Fragment
Unknown
Rock
Chalcedony
Silicon Dioxide (SiO2)
mineral
Unakite
Altered granitic rock (epidosite/unakite)
metamorphic
Unakite (or Polished Jasper Pebble)
Altered Granite (Epidote-Orthoclase Rock)
metamorphic
Unakite
Altered Granite (composed of epidote, pink orthoclase feldspar, and quartz)
metamorphic
Unakite
Granitic Unakite (Alteration rock composed of pink orthoclase feldspar, green epidote, and clear quartz)
metamorphic
Marble
Recrystallized Calcite / Metamorphosed Limestone (CaCO3)
metamorphic
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Rounded brown river pebble
Indeterminate lithic fragment; likely weathered sandstone, mudstone, or fine-grained volcanic rock
sedimentary