Rock Identifier

Category

Metamorphic (Altered Igneous Rock)

Browse metamorphic (altered igneous rock) specimens identified by the Rock Identifier community.

Greenstone / Serpentinite (Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Greenstone / Serpentinite

Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)

River Rock (Basalt) (Aphanitic Basaltic Rock) — igneous

River Rock (Basalt)

Aphanitic Basaltic Rock

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Gray Quartzite with Quartz Veining (Metamorphosed Quartz-rich Sandstone) — metamorphic

Gray Quartzite with Quartz Veining

Metamorphosed Quartz-rich Sandstone

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Granite (Felsic Intrusive Igneous Rock) — igneous

Granite

Felsic Intrusive Igneous Rock

Gabbro (Phaneritic Mafic Igneous Rock) — igneous

Gabbro

Phaneritic Mafic Igneous Rock

Syenite (Syenite (Phaneritic Igneous Rock)) — igneous

Syenite

Syenite (Phaneritic Igneous Rock)

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

Diorite (Intermediate Phaneritic Igneous Rock) — igneous

Diorite

Intermediate Phaneritic Igneous Rock

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Granite (Phaneritic intrusive igneous rock) — igneous

Granite

Phaneritic intrusive igneous rock

Granite (Felsic Intrusive Igneous Rock) — igneous

Granite

Felsic Intrusive Igneous Rock

Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

Granite Pebble (Phaneritic Felsic Igneous Rock) — igneous

Granite Pebble

Phaneritic Felsic Igneous Rock

Granite Pebble with Quartz/Mafic Vein (Felsic Igneous Rock (Granitic)) — igneous

Granite Pebble with Quartz/Mafic Vein

Felsic Igneous Rock (Granitic)

Granite River Stone (Phaneritic Felsic Igneous Rock) — igneous

Granite River Stone

Phaneritic Felsic Igneous Rock

Granite Cobble (Phaneritic Felsic Igneous Rock) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock

Pink Granite (Granite (Phaneritic Igneous Rock)) — igneous

Pink Granite

Granite (Phaneritic Igneous Rock)

Granite Cobble (Phaneritic Felsic Igneous Rock) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock

Granite Pebble (Granite (Phaneritic Igneous Rock)) — igneous

Granite Pebble

Granite (Phaneritic Igneous Rock)

Granite Pebble (Felsic Intrusive Igneous Rock) — igneous

Granite Pebble

Felsic Intrusive Igneous Rock

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Granite (Intrusive igneous felsic rock) — igneous

Granite

Intrusive igneous felsic rock

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Granite (Intrusive Felsic Igneous Rock) — igneous

Granite

Intrusive Felsic Igneous Rock

Diorite (Dalmatian Stone variant) (Intermediate Phaneritic Igneous Rock) — igneous

Diorite (Dalmatian Stone variant)

Intermediate Phaneritic Igneous Rock

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Granite Water-Worn Pebble (Phaneritic Felsic Igneous Rock) — igneous

Granite Water-Worn Pebble

Phaneritic Felsic Igneous Rock

Diorite (Intermediate Phaneritic Igneous Rock) — igneous

Diorite

Intermediate Phaneritic Igneous Rock

Basalt (Basalt (Mafic igneous rock)) — igneous

Basalt

Basalt (Mafic igneous rock)

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Diorite (Phaneritic Intermediate Igneous Rock) — igneous

Diorite

Phaneritic Intermediate Igneous Rock

Granite (Plutonic Igneous Rock (Granite)) — igneous

Granite

Plutonic Igneous Rock (Granite)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock