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

Rhodonite in Matrix (Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3) — mineral

Rhodonite in Matrix

Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Mica Schist (Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Weathered quartz-rich pebble, possibly metasandstone (Quartz-rich metasandstone (provisional); mainly SiO₂ with minor feldspar, mica, or iron oxides) — metamorphic

Weathered quartz-rich pebble, possibly metasandstone

Quartz-rich metasandstone (provisional); mainly SiO₂ with minor feldspar, mica, or iron oxides

Serpentine (polished/tumbled piece) (Serpentinite; chiefly antigorite, lizardite, and/or chrysotile, commonly with magnetite and carbonate minerals) — metamorphic

Serpentine (polished/tumbled piece)

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile, commonly with magnetite and carbonate minerals

Serpentinite (Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), with magnetite and relic mafic minerals) — metamorphic

Serpentinite

Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), with magnetite and relic mafic minerals

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Serpentinized ultramafic rock (likely serpentinite) (Serpentinite; chiefly lizardite, antigorite, and/or chrysotile, commonly with magnetite, chromite, and residual olivine/pyroxene) — metamorphic

Serpentinized ultramafic rock (likely serpentinite)

Serpentinite; chiefly lizardite, antigorite, and/or chrysotile, commonly with magnetite, chromite, and residual olivine/pyroxene

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Jasper (Red Jasper (Silicon Dioxide - SiO2)) — sedimentary

Red Jasper

Red Jasper (Silicon Dioxide - SiO2)

Mixed rounded rock pebbles (Likely granitic gneiss, basaltic rock, and quartz-rich granitic material; exact identification is uncertain from the image) — igneous

Mixed rounded rock pebbles

Likely granitic gneiss, basaltic rock, and quartz-rich granitic material; exact identification is uncertain from the image

Likely quartz-rich rock fragment (Quartz (SiO₂), possibly iron-stained quartz or quartzite) — mineral

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly iron-stained quartz or quartzite

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — Mineral (Variety of Quartz)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Mineral (Variety of Quartz)

Yellow Jasper (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Tumbled quartz-rich rock, possibly calcite or sandstone (Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)) — mineral

Tumbled quartz-rich rock, possibly calcite or sandstone

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Tumbled quartz-rich carbonate rock (Likely massive quartz (SiO₂), possibly calcite-bearing marble or limestone) — mineral

Tumbled quartz-rich carbonate rock

Likely massive quartz (SiO₂), possibly calcite-bearing marble or limestone

Ornamental ring with likely blue sapphire and diamonds (Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal) — gemstone

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Aquamarine (Beryl (Be3Al2Si6O18 with Fe impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with Fe impurities)

Muscovite mica (Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂) — mineral

Muscovite mica

Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂

White Quartz (Quartz (SiO2)) — Mineral

White Quartz

Quartz (SiO2)

Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix (Beryllium Aluminum Silicate (Be3Al2Si6O18)) — mineral

Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Amethyst (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst

Quartz (Silicon Dioxide, SiO2)

Muscovite (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite

Muscovite (KAl2(AlSi3O10)(OH)2)

Pale green rounded boulder, likely altered serpentinite or greenstone (Probable serpentinized ultramafic rock; exact identification requires testing) — metamorphic

Pale green rounded boulder, likely altered serpentinite or greenstone

Probable serpentinized ultramafic rock; exact identification requires testing

Fuchsite Gneiss (Green Quartzite) (Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)) — metamorphic

Fuchsite Gneiss (Green Quartzite)

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)

Polished dark stone, likely nephrite jade or serpentine (Tentatively nephrite (fibrous amphibole aggregate, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); possibly serpentine) — mineral

Polished dark stone, likely nephrite jade or serpentine

Tentatively nephrite (fibrous amphibole aggregate, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); possibly serpentine

Carnelian Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

Foliated slate or phyllite (Fine-grained metamorphosed mudstone; typically quartz, mica, chlorite, and clay-derived minerals) — metamorphic

Foliated slate or phyllite

Fine-grained metamorphosed mudstone; typically quartz, mica, chlorite, and clay-derived minerals

Serpentine (Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)

Tumbled quartz-bearing rock, possibly garnet-bearing quartzite (Quartz-dominant silicate rock; visible minerals may include quartz, iron oxides, and dark mica or amphibole) — metamorphic

Tumbled quartz-bearing rock, possibly garnet-bearing quartzite

Quartz-dominant silicate rock; visible minerals may include quartz, iron oxides, and dark mica or amphibole

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Green Aventurine (Quartz with fuchsite inclusions (SiO2)) — mineral

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

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

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Carnelian Agate (SiO2 (Silicon Dioxide)) — mineral

Carnelian Agate

SiO2 (Silicon Dioxide)

Yellow Jasper (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Carnelian (Carnelian Agate) (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian (Carnelian Agate)

Carnelian (Silicon Dioxide - SiO2)

Green calcite (probable) (Calcite, calcium carbonate (CaCO₃)) — mineral

Green calcite (probable)

Calcite, calcium carbonate (CaCO₃)

Turquoise (Dyed Howlite/Magnesite imitation) (CuAl6(PO4)4(OH)8·4H2O (Target mineral) / MgCO3 (Magnesite substrate)) — mineral

Turquoise (Dyed Howlite/Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Target mineral) / MgCO3 (Magnesite substrate)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist