Serpentine
Antigorite/Chrysotile/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
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Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Unakite
Granitic Unakite (Alteration rock composed of pink orthoclase feldspar, green epidote, and clear quartz)
metamorphic
Unakite (or Polished Jasper Pebble)
Altered Granite (Epidote-Orthoclase Rock)
metamorphic
Unakite
Altered Granite (composed of epidote, pink orthoclase feldspar, and quartz)
metamorphic
Marble
Recrystallized Calcite / Metamorphosed Limestone (CaCO3)
metamorphic
Rounded quartz-rich pebble
Likely milky quartz or quartzite (SiO₂)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Serpentine
Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4
metamorphic
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Rhodonite
Inosilicate, (Mn,Fe,Mg,Ca)SiO3
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Chalcedony
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Marble
Metamorphic Limestone (CaCO3)
metamorphic
Serpentinized ultramafic rock (likely serpentinite)
Serpentinite; chiefly serpentine-group minerals Mg₃Si₂O₅(OH)₄, with magnetite, olivine, and pyroxene remnants
metamorphic
Likely greenstone (serpentinized ultramafic rock)
Serpentinite, dominated by serpentine-group minerals (chrysotile/lizardite/antigorite), possibly with chlorite or epidote
metamorphic
Weathered quartz-rich pebble (probable quartzite or quartz vein fragment)
Quartzite, predominantly silicon dioxide (SiO₂); exact identification is uncertain from the photograph
metamorphic
Mixed pebble collection, including likely flint, quartzite, and fossil material
Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil
sedimentary
Milky quartz pebble
Quartz (SiO₂), likely massive or microcrystalline quartz
mineral
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
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Unakite
Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Unakite
Unakite (Epidotized Granite)
metamorphic
Mica Schist
Schist (Crystalline metamorphic rock)
metamorphic
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Yellow Chalcedony (likely carnelian or yellow agate)
Silicon Dioxide (SiO₂)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Jasper or Agate with Chlorite Inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Seraphinite
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral