Rock Identifier

Category

Metamorphic Or Sedimentary Depending On Local Grade

Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.

Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Clear Quartz Cluster (Quartz (Silicon Dioxide - SiO2)) — mineral

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Granitoid (Granite/Gneiss) (Granitoid silicate rock, primarily quartz and feldspar) — igneous/metamorphic

Granitoid (Granite/Gneiss)

Granitoid silicate rock, primarily quartz and feldspar

igneous/metamorphic

Yellow Quartz (Citrine or Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Labradorite (Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)

Garnet (Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3) — Mineral

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Emerald in Matrix (Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Rough Ruby (Corundum (Al2O3 with Chromium impurities)) — mineral

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

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

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Sandstone Concretion (Septarian or Carbonate-cemented Sandstone Concretion) — sedimentary

Sandstone Concretion

Septarian or Carbonate-cemented Sandstone Concretion

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Limonite (Ironstone Concretion) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Ironstone Concretion)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Anthracite Coal (Anthracite (Carbon-rich mineraloid)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich mineraloid)

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Green Schist (Greenschist (composed of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Mixed Gemstone Beaded Jewelry (Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)) — Mineral

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Diamond (Diamond (Pure Carbon - C)) — mineral

Diamond

Diamond (Pure Carbon - C)

Quartz (River Pebble) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Smoky Quartz (Smoky Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Serpentine (Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)) — metamorphic

Serpentine

Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Sandstone (Fossiliferous) (Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone (Fossiliferous)

Arenite / Clastic Sedimentary Rock

Chert (Black Chert) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Black Chert)

Microcrystalline Silica (SiO2)

Anthracite (Anthracite Coal) — metamorphic

Anthracite

Anthracite Coal

Caliche (also known as hardpan, calcrete, kankar) (Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.) — Mineral

Caliche (also known as hardpan, calcrete, kankar)

Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.

Banded Chert (Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)) — Sedimentary

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Marble (Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)) — metamorphic

Marble

Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)

Unakite (Epidotized Granite) (Epidotized Granite) — metamorphic

Unakite (Epidotized Granite)

Epidotized Granite

Marble (Carrara Marble style) (Recrystallized Calcite (CaCO3)) — metamorphic

Marble (Carrara Marble style)

Recrystallized Calcite (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Lapis Lazuli (Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Serpentinite (Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)

Rough Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Rough Nephrite Jade

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

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

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

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

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

Blue Quartzite (Quartzite with inclusions (SiO2)) — metamorphic

Blue Quartzite

Quartzite with inclusions (SiO2)

Ruby in Zoisite (Ruby (Corundum, Al2O3) in Zoisite (Calcium aluminum silicate hydroxide, Ca2Al3(SiO4)3(OH)) with some Hornblende) — Metamorphic Rock (specifically a rock composed of minerals)

Ruby in Zoisite

Ruby (Corundum, Al2O3) in Zoisite (Calcium aluminum silicate hydroxide, Ca2Al3(SiO4)3(OH)) with some Hornblende

Metamorphic Rock (specifically a rock composed of minerals)

Quartz (Iron-Stained or Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Prasiolite (Green Quartz) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite (Green Quartz)

Silicon Dioxide (SiO2) with iron impurities