Rock Identifier

Category

Sedimentary Or Metamorphic Derived

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

Smoky Quartz (Quartz (SiO₂)) — Mineral

Smoky Quartz

Quartz (SiO₂)

Mineral
Fired Clay Brick (Anthropic Rock substitute) (Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)) — metamorphic (man-made / anthropic)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

metamorphic (man-made / anthropic)
Calcite (likely a tumbled specimen) (Calcite (CaCO 3 )) — Mineral

Calcite (likely a tumbled specimen)

Calcite (CaCO 3 )

Mineral
Calcite (Calcite (CaCO3)) — Mineral

Calcite

Calcite (CaCO3)

Mineral
Hypersthene (or Enstatite/Ferrosilite) (Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)) — Mineral

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Mineral
Quartz Geode/Druzy Quartz (Quartz (SiO₂)) — Mineral

Quartz Geode/Druzy Quartz

Quartz (SiO₂)

Mineral
Peridot and Citrine Gemstones (in a ring setting) (Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)) — mineral

Peridot and Citrine Gemstones (in a ring setting)

Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)

mineral
Quartz (variety of colors) (SiO2 (Silicon Dioxide)) — Mineral

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Mineral
Aquamarine and clear quartz (Aquamarine (Be3Al2Si6O18), Quartz (SiO2)) — Mineral

Aquamarine and clear quartz

Aquamarine (Be3Al2Si6O18), Quartz (SiO2)

Mineral
Jasper and Aquamarine (likely) (Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))) — Sedimentary (Jasper), Mineral (Aquamarine)

Jasper and Aquamarine (likely)

Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))

Sedimentary (Jasper), Mineral (Aquamarine)
Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads) (Chalcedony (SiO2), Jasper (SiO2 with impurities)) — Mineral (specifically a cryptocrystalline variety of Quartz)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Mineral (specifically a cryptocrystalline variety of Quartz)
Jasper (Wonderstone/Banded Jasper) (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary (chemical/biological origin) or volcanic-related metamorphic

Jasper (Wonderstone/Banded Jasper)

Silicon Dioxide (SiO2) with iron oxide impurities

sedimentary (chemical/biological origin) or volcanic-related metamorphic
Calcite (or Alabaster, if truly carved) (Calcium Carbonate (CaCO3)) — Mineral/Rock

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Mineral/Rock
Pegmatite (likely Granitic Pegmatite) (Pegmatite (a coarse-grained igneous rock, often with granitic composition)) — igneous

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

igneous
Opal (Hydrous silicon dioxide (SiO2·nH2O)) — mineral

Opal

Hydrous silicon dioxide (SiO2·nH2O)

mineral
Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral with metamorphic or sedimentary host

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

mineral with metamorphic or sedimentary host
Sodalite (Sodalite - Na8(Al6Si6O24)Cl2) — Mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Mineral
Quartz Geode (Nodule) (Silicon Dioxide (SiO2)) — sedimentary or igneous

Quartz Geode (Nodule)

Silicon Dioxide (SiO2)

sedimentary or igneous
Baroque Pearl (and potentially a small Sapphire/Blue Topaz) (Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.) — Organic Gemstone (for pearl), Mineral (for sapphire/topaz)

Baroque Pearl (and potentially a small Sapphire/Blue Topaz)

Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.

Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Quartz (Druzy) in host rock (SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)) — Mineral

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Mineral
Jasper and Basalt Mix (Dark Chert/Basalt River Pebble) (Silicon Dioxide (SiO2) or Mafic extrusive igneous rock) — sedimentary or igneous

Jasper and Basalt Mix (Dark Chert/Basalt River Pebble)

Silicon Dioxide (SiO2) or Mafic extrusive igneous rock

sedimentary or igneous
River Pebble (Greywacke or Basaltic) (Massive Greywacke or Basaltic Andesite) — sedimentary or igneous

River Pebble (Greywacke or Basaltic)

Massive Greywacke or Basaltic Andesite

sedimentary or igneous
Painted River Pebble (likely Basalt or Greywacke) (Aphanitic Lithic Clast with Anthropogenic Pigment coating) — Sedimentary or Igneous

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Sedimentary or Igneous
River Stone (likely Siltstone or fine-grained Basalt) (Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)) — sedimentary or igneous

River Stone (likely Siltstone or fine-grained Basalt)

Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)

sedimentary or igneous
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate) (N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)) — Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Granite (Granite (a felsic intrusive igneous rock)) — Igneous Rock

Granite

Granite (a felsic intrusive igneous rock)

Igneous Rock
Chert or Flint (polished/water-worn) (Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.) — Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)
Quartz Geode (with Agate banding) (Silicon Dioxide (SiO2)) — Sedimentary or Igneous (secondary formation)

Quartz Geode (with Agate banding)

Silicon Dioxide (SiO2)

Sedimentary or Igneous (secondary formation)
Quartz Geode (Silicon Dioxide (SiO2) in a Geode body) — sedimentary or igneous (host environment)

Quartz Geode

Silicon Dioxide (SiO2) in a Geode body

sedimentary or igneous (host environment)
Lapis Lazuli (blue bead) and Moss Agate (green heart) (Lapis Lazuli (lazurite-based rock) and Moss Agate (SiO2 with manganese/iron inclusions)) — metamorphic (Lapis) and sedimentary/igneous assoc. (Moss Agate)

Lapis Lazuli (blue bead) and Moss Agate (green heart)

Lapis Lazuli (lazurite-based rock) and Moss Agate (SiO2 with manganese/iron inclusions)

metamorphic (Lapis) and sedimentary/igneous assoc. (Moss Agate)
Jasper (specifically Polychrome or Desert Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary or igneous-associated mineral

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with impurities

sedimentary or igneous-associated mineral
Pink Thulite (Zoisite) (Ca2Al3(SiO4)3(OH) - Manganese-bearing Zoisite) — mineral

Pink Thulite (Zoisite)

Ca2Al3(SiO4)3(OH) - Manganese-bearing Zoisite

mineral
Green Slag Glass (Cullet) (Amorphous Silica (Industrial Glass Byproduct)) — Synthetic/Byproduct (Non-igneous, non-sedimentary, non-metamorphic)

Green Slag Glass (Cullet)

Amorphous Silica (Industrial Glass Byproduct)

Synthetic/Byproduct (Non-igneous, non-sedimentary, non-metamorphic)
Limestone (Calcareous Sedimentary Rock (CaCO3)) — sedimentary

Limestone

Calcareous Sedimentary Rock (CaCO3)

sedimentary
Chalcedony Geode (Chalcedony (SiO2) within a geode structure) — Mineral Geode/Sedimentary or Volcanic related

Chalcedony Geode

Chalcedony (SiO2) within a geode structure

Mineral Geode/Sedimentary or Volcanic related
Epidote (Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)) — mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral
Epidote (Epidote - Ca2(Al,Fe)3(SiO4)3(OH)) — metamorphic

Epidote

Epidote - Ca2(Al,Fe)3(SiO4)3(OH)

metamorphic
Almandine Garnet (Fe3Al2(SiO4)3) — mineral

Almandine Garnet

Fe3Al2(SiO4)3

mineral
Metagabbro / Epidote Gneiss (Epidote bearing Hornblende Gneiss) — metamorphic

Metagabbro / Epidote Gneiss

Epidote bearing Hornblende Gneiss

metamorphic
River Cobble (likely Basalt or Metagraywacke) (Non-specific water-worn lithic fragment) — igneous or metamorphic

River Cobble (likely Basalt or Metagraywacke)

Non-specific water-worn lithic fragment

igneous or metamorphic
Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

metamorphic
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral