Diorite (Salt and Pepper Rock)
Diorite
igneous
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
Ironstone Concretion / Limonite Node
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O) with Goethite/Hematite
sedimentary
Granitic Pegmatite
Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)
igneous
Quartzite (River Cobble)
Quartzite (Metamorphosed Quartz Sandstone, SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Green Aventurine (likely)
Silicon dioxide (SiO2) with fuchsitemica inclusions
Mineral (specifically a variety of Quartz)
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Green Quartzite
Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Basalt
Basalt
Igneous
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Granite
Granite (a common igneous rock)
igneous
Basalt (Vesicular)
Vesicular Basalt
Igneous
Basalt with Scoria
Amygdaloidal Basalt / Vesicular Basalt
igneous
Obsidian
Obsidian (Volcanic Glass, primarily SiO2)
igneous
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Basalt (with possible weathering or secondary mineral crust)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Schist
Mica Schist (variety: Muscovite/Biotite Schist)
metamorphic
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Granodiorite / Granite
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Red Sandstone
Arenite (composed primarily of SiO2 with Fe2O3 cementation)
sedimentary
Basalt with Iron Oxidation
Aphanitic Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)
igneous
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Diorite (Spotted or Dalmatian Stone effect)
Diorite (Intermediate Plutonic Rock)
igneous
Pink Granite
Granite (Phaneritic intrusive rock)
igneous
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
sedimentary
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
igneous
Granite
Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)
igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Green Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Quartzite Cobble
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Glauconitic Sandstone (Greensand)
Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary