Greenschist
Greenschist facies rock
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Greenschist
Greenschist facies rock
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
Peridot (likely, based on color and appearance)
Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)
Granite / Quartz Vein Rock
Granitoid with Quartz (SiO2)
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Greenschist (Greenstone)
Greenschist
Larvikite
Monzonite (intermediate intrusive igneous rock containing plagioclase, alkali feldspar, and minor dark minerals)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
Basalt
Basalt (Mafic volcanic rock)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
Schist (Chlorite or Mica-rich)
Chlorite Schist
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Granite
Granite (Felsic Plutonic Rock)
Carnelian Agate
Chalcedony (Silicon Dioxide, SiO2) with Iron Oxide impurities
Clear Quartz (Crystal Quartz)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
Basalt River Stone
Aphanitic Mafic Igneous Rock
Basalt
Basalt (Mafic igneous rock)
Basalt
Basalt (Mafic igneous rock)
Basalt (River-worn Specimen)
Extrusive Mafic Igneous Rock
Basalt (Beach Pebble)
Extrusive mafic igneous rock
Basalt Pebble
Extrusive mafic igneous rock
Vesicular Basalt
Basalt (Extrusive Igneous Rock)
Basalt
Extrusive mafic igneous rock
Basalt (River Pebble)
Extrusive mafic igneous rock
Basalt
Extrusive mafic igneous rock
Basalt
Extrusive mafic igneous rock
Basalt
Extrusive mafic igneous rock
Vesicular Basalt
Extrusive Mafic Igneous Rock
Basalt (Weathered/Tumbled)
Extrusive Mafic Igneous Rock
Basalt
Aphanitic Mafic Igneous Rock
Basalt (River Pebble)
Extrusive mafic igneous rock
Basalt (River Cobble)
Mafic Igneous Basalt (composed primarily of Plagioclase feldspar, Pyroxene, and Olivine)
Basalt
Basalt
Basalt
Mafic volcanic rock (primarily Plagioclase and Pyroxene)
Basalt (River Pebble)
Extrusive Mafic Igneous Rock
Basalt (Vesicular)
Extrusive mafic igneous rock