Diabase (also known as Dolerite)
Diabase
Category
Browse igneous and sedimentary mixture specimens identified by the Rock Identifier community.
Diabase (also known as Dolerite)
Diabase
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
Basalt
Basalt (Mafic volcanic rock)
Obsidian
Obsidian (Volcanic Glass)
Basalt Column Section
Columnar Basalt (Mafic Extrusive Igneous Rock)
Pink Granite (River Pebble)
Felsic Intrusive Igneous Rock
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
Granite
Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)
Basalt
Extrusive mafic igneous rock
Gold Sheen Obsidian
Obsidian (volcanic glass with SiO2 + gas inclusions)
Pink Granite (Gneissic transition)
Pink Biotite Granite
Pumice
Pumice (Vitreous volcanic rock)
Pumice
Pumice (a highly vesicular extrusive igneous rock)
Porphyritic Basalt or Andesite
Porphyritic Basalt / Andesite
Stream Pebble (Basalt/Greywacke)
Mafic Igneous Rock (Fine-grained)
Granite Cobble
Granite (Phaneritic Igneous Rock)
Basalt
Basalt (composition predominately plagioclase feldspar and pyroxene)
Pumice
Pumice (Vitreous pyroclastic rock)
Scoria (Lava Rock)
Scoria
Granite
Phaneritic Plutonic Felsic Rock
Granite
Granite (Phaneritic Igneous Rock)
Vesicular Basalt
Aphanitic Mafic Igneous Rock (with Vesicular Texture)
Granite Pebble
Granite (composed mainly of Quartz, Feldspar, and Mica)
Granite
Granite (Phaneritic Igneous Rock)
Basalt
Mafic volcanic rock (various silicate minerals including Pyroxene and Plagioclase)
Granite
Granite (Felsic Plutonic Rock)
Granite
Granite
Granite
Granite (Felsic Plutonic Rock)
Basalt
Basalt (dominated by Plagioclase Feldspar and Pyroxene)
Diorite (Salt and Pepper Rock)
Diorite
Basalt
Basalt (composition of Plagioclase feldspar and Pyroxene)
Basalt
Basalt
Granite
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
Gabbro
Gabbro
Granite
Felsic intrusive igneous rock
Diabase
Diabase (also known as Dolerite)
Granite
Granite (Phaneritic Quartz-Feldspar rock)
Granite
Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)
Granite
Granite (Felsic intrusive igneous rock)
Basalt
Basalt
Pegmatite (with smoky quartz and tourmaline/biotite)
Pegmatitic Granite
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)