Rock Identifier

Category

Sedimentary Or Metamorphic Derived

Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.

Learn about Sedimentary Or Metamorphic Derived in the encyclopedia

Khondalite

Calc-schist

Goldmanite

Oregon Opal

Orendite

Orthoclase

Orca Agate

Orange Opal

Peacock Ore

Orange Garnet

Orange Obsidian

Orange Calcite

Unakite (Altered Granite (composed of orthoclase feldspar, epidote, and quartz)) — metamorphic

Unakite

Altered Granite (composed of orthoclase feldspar, epidote, and quartz)

Chrysoprase-bearing serpentinite (probable) (Serpentinized ultramafic rock; chiefly serpentine-group minerals, with possible chrysoprase (nickel-bearing chalcedony) and magnesite) — metamorphic

Chrysoprase-bearing serpentinite (probable)

Serpentinized ultramafic rock; chiefly serpentine-group minerals, with possible chrysoprase (nickel-bearing chalcedony) and magnesite

Chalcedony with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Blue Celestite (Celestine (Strontium Sulfate, SrSO4)) — mineral

Blue Celestite

Celestine (Strontium Sulfate, SrSO4)

Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Jasper (specifically Red or Brecciated Jasper variant) (Jasper (Microcrystalline Quartz - SiO2)) — sedimentary

Jasper (specifically Red or Brecciated Jasper variant)

Jasper (Microcrystalline Quartz - SiO2)

Pyrite-bearing rock (likely pyrite-rich quartz or schist) (Pyrite, FeS₂, intergrown with quartz and/or mica-rich matrix) — mineral

Pyrite-bearing rock (likely pyrite-rich quartz or schist)

Pyrite, FeS₂, intergrown with quartz and/or mica-rich matrix

Feldspar (specifically Orthoclase) (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Iron-stained quartzite or ironstone pebble (Quartzite (mostly SiO₂) with iron-oxide/hydroxide minerals, likely hematite/goethite) — metamorphic

Iron-stained quartzite or ironstone pebble

Quartzite (mostly SiO₂) with iron-oxide/hydroxide minerals, likely hematite/goethite

Weathered iron-rich quartzite or sandstone pebble (Ferruginous quartzite; primarily quartz (SiO₂) with iron-oxide coatings) — metamorphic

Weathered iron-rich quartzite or sandstone pebble

Ferruginous quartzite; primarily quartz (SiO₂) with iron-oxide coatings

Serpentinized ultramafic rock (probable serpentinite) (Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile/antigorite), with possible magnetite and carbonate) — metamorphic

Serpentinized ultramafic rock (probable serpentinite)

Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile/antigorite), with possible magnetite and carbonate

Weathered feldspathic quartzite or granitic rock fragment (Quartz-rich silicate rock; exact identification requires thin-section or chemical testing) — metamorphic

Weathered feldspathic quartzite or granitic rock fragment

Quartz-rich silicate rock; exact identification requires thin-section or chemical testing

Polished dark river pebble, likely serpentinite or altered ultramafic rock (Serpentinite (predominantly serpentine-group minerals; identification is provisional)) — metamorphic

Polished dark river pebble, likely serpentinite or altered ultramafic rock

Serpentinite (predominantly serpentine-group minerals; identification is provisional)

Actinolite (Ca2(Mg,Fe)5Si8O22(OH)2) — mineral

Actinolite

Ca2(Mg,Fe)5Si8O22(OH)2

Green-speckled pebble, likely epidote-bearing basalt or altered granite (Probable epidote (Ca₂(Al,Fe)₃(SiO₄)₃(OH)) in a mafic or felsic host; exact identification requires testing) — igneous

Green-speckled pebble, likely epidote-bearing basalt or altered granite

Probable epidote (Ca₂(Al,Fe)₃(SiO₄)₃(OH)) in a mafic or felsic host; exact identification requires testing

Kaolinite (China Clay) (Kaolinite (Al2Si2O5(OH)4)) — sedimentary

Kaolinite (China Clay)

Kaolinite (Al2Si2O5(OH)4)

Serpentine (Serpentinite) (Serpentinite (composed largely of serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)) — metamorphic

Serpentine (Serpentinite)

Serpentinite (composed largely of serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Kaolin (China Clay) (Kaolinite [Al2Si2O5(OH)4]) — sedimentary

Kaolin (China Clay)

Kaolinite [Al2Si2O5(OH)4]

Pearl (Pearl; primarily aragonite (CaCO₃) in nacre) — gemstone

Pearl

Pearl; primarily aragonite (CaCO₃) in nacre

Red jasper (likely iron-rich chert) (Microcrystalline quartz, SiO₂, colored by iron oxides) — sedimentary

Red jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored by iron oxides

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Red Jasper (Jasper (Silicon Dioxide with Hematite inclusions), SiO2) — sedimentary

Red Jasper

Jasper (Silicon Dioxide with Hematite inclusions), SiO2

Fancy Jasper (Mookaite style) (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Fancy Jasper (Mookaite style)

Silicon Dioxide (SiO2) with iron oxide impurities

Red Jasper (Quartz (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Quartz (SiO2) with iron oxide inclusions

Jasper (specifically Bloodstone or Heliotrope variety) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper (SiO2 (Silicon Dioxide with Iron inclusions)) — sedimentary

Red Jasper

SiO2 (Silicon Dioxide with Iron inclusions)

Slate (Slate; fine-grained metamorphosed shale, commonly mica- and chlorite-rich) — metamorphic

Slate

Slate; fine-grained metamorphosed shale, commonly mica- and chlorite-rich

Blue Celestite (Strontium Sulfate (SrSO4)) — mineral

Blue Celestite

Strontium Sulfate (SrSO4)

Red Jasper (Opaque Chalcedony) (Silicon Dioxide (SiO2) with Hematite impurities) — mineral

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite impurities

Rounded brown pebble, likely quartzite (Quartzite (predominantly interlocking quartz, SiO₂); identification is tentative from the photo) — metamorphic

Rounded brown pebble, likely quartzite

Quartzite (predominantly interlocking quartz, SiO₂); identification is tentative from the photo

Serpentine (Antigorite/Chrysotile/Lizardite (Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite/Chrysotile/Lizardite (Mg,Fe)3Si2O5(OH)4

Tumbled white quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂)

Dark granitic rock, likely granodiorite (Medium-grained granitoid; probably biotite granodiorite or quartz diorite) — igneous

Dark granitic rock, likely granodiorite

Medium-grained granitoid; probably biotite granodiorite or quartz diorite

Rounded granitic/gneissic cobble (Probable granodiorite or orthogneiss; quartz–feldspar–biotite aggregate) — igneous

Rounded granitic/gneissic cobble

Probable granodiorite or orthogneiss; quartz–feldspar–biotite aggregate

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Mixed rounded fieldstones, likely granite and gneiss (Granite (quartz–feldspar–mica) and gneiss; exact identification is uncertain from the photograph) — igneous and metamorphic

Mixed rounded fieldstones, likely granite and gneiss

Granite (quartz–feldspar–mica) and gneiss; exact identification is uncertain from the photograph

igneous and metamorphic