Rock Identifier

Category

Igneous Rock

Browse igneous rock specimens identified by the Rock Identifier community.

Basalt (Basalt) — igneous

Basalt

Basalt

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Porfido (Porphyritic Rock) (Porphyry (often Rhyolitic or Andesitic)) — igneous

Porfido (Porphyritic Rock)

Porphyry (often Rhyolitic or Andesitic)

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Basalt Arrowhead (worked stone) (Aphanitic mafic volcanic rock (Basalt)) — igneous

Basalt Arrowhead (worked stone)

Aphanitic mafic volcanic rock (Basalt)

Not a rock (Not a rock) — Not a rock

Not a rock

Not a rock

Vesicular Basalt (Amygdaloidal) (Amygdaloidal Basalt (Mafic volcanic rock)) — igneous

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt (Mafic volcanic rock)

Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Basalt (River Stone) (Basalt (Aphanitic mafic volcanic rock)) — igneous

Basalt (River Stone)

Basalt (Aphanitic mafic volcanic rock)

Clear Quartz (Rock Crystal) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Diorite (Salt and Pepper Rock) (Diorite) — igneous

Diorite (Salt and Pepper Rock)

Diorite

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Scoria (Lava Rock) (Scoriaceous Basalt) — igneous

Scoria (Lava Rock)

Scoriaceous Basalt

Lava Rock (Scoria) (Scoria (Vesicular Basalt)) — igneous

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

Diabase (Trap Rock) (Diabase (also known as Dolerite)) — igneous

Diabase (Trap Rock)

Diabase (also known as Dolerite)

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Lava Rock (Scoria) (Extrusive basaltic scoria) — igneous

Lava Rock (Scoria)

Extrusive basaltic scoria

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Chinese Writing Stone (Porphyritic Basalt (or Andesite) with Feldspar inclusions) — igneous

Chinese Writing Stone

Porphyritic Basalt (or Andesite) with Feldspar inclusions

Diorite (Spotted or Dalmatian Stone pattern) (Diorite) — igneous

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Basalt (Vesicular Basalt (Mafic volcanic rock)) — Igneous

Basalt

Vesicular Basalt (Mafic volcanic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Blue Sapphire (Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)) — mineral

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Serpentinite (Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

Gneiss (River Cobble) (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss (River Cobble)

Gneiss (Foliated Metamorphic Rock)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (River Stone) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Stone)

Silicon Dioxide (SiO2)

Porphyritic Basalt (Porphyritic Basalt (with plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Porphyritic Basalt (with plagioclase phenocrysts)

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz on Host Rock (Silicon Dioxide (SiO2)) — Mineral Specimen

Quartz on Host Rock

Silicon Dioxide (SiO2)

Mineral Specimen

Quartz (Clear Quartz/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Basalt (Mafic volcanic rock (consisting mostly of plagioclase, pyroxene, and olivine)) — igneous

Basalt

Mafic volcanic rock (consisting mostly of plagioclase, pyroxene, and olivine)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Basalt (Basalt) — igneous

Basalt

Basalt

Chinese Writing Stone (Porphyritic Basalt or Porphyritic Andesite with Feldspar phenocrysts (SiO2-rich Silicates)) — igneous

Chinese Writing Stone

Porphyritic Basalt or Porphyritic Andesite with Feldspar phenocrysts (SiO2-rich Silicates)

Basalt (Porphyritic) (Porphyritic Mafic Extrusive (Basalt)) — igneous

Basalt (Porphyritic)

Porphyritic Mafic Extrusive (Basalt)

Pumice (Pumicite (Amorphous volcanic glass)) — Igneous

Pumice

Pumicite (Amorphous volcanic glass)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Peridotite (with Olivine and Pyroxene) (Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)) — igneous

Peridotite (with Olivine and Pyroxene)

Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)