Diorite (River Cobble)
Phaneritic Intermediate Plutonic Rock
igneous
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
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Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Blue Quartzite (River Pebble)
Quartzite (primarily SiO2 with Dumortierite or Crocidolite inclusions)
metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Golden Healer Quartz
Ferruginous Quartz (SiO2 with Fe2O3 inclusions)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite with Iron Inclusions
Quartzite (primarily SiO2)
metamorphic
Serpentine
Serpentine group (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Unakite
Epidotized Granite
metamorphic
Herkimer Diamond
Quartz (Silica - SiO2)
mineral
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Unakite
Epidotized Granite
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)
Metamorphic Rock / Mineral
Granitic Pegmatite
Pegmatitic Granite
igneous
Painted River Rock (likely Quartzite or Granite)
Quartzite or Granitic Gneiss (painted)
metamorphic
Limonitic Quartzite
Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining
metamorphic
Pumice (Volcanic Rock)
Vesicular volcanic rock (composed largely of amorphous volcanic glass)
igneous
Garnet Schist
Almandine-Mica Schist
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Vesicular Basalt (or Scoraceous Basalt)
Basalt (Vesicular texture)
igneous
Basalt with Epidote/Chlorite
Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))
igneous
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Rhyolite
Amygdaloidal Rhyolite (Felsic volcanic rock)
igneous
Coral Fossil (Petrified Coral)
Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Arsenopyrite
Arsenopyrite (FeAsS)
mineral
Peacock Ore (Bornite/Chalcopyrite)
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a sedimentary or volcanic host
mineral
Septarian Nodule Segment (Commonly known as Dragon Stone or Lightning Stone)
Septarian Nodule (CaCO3 / Hydrated Calcium Carbonate)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Azurite
Azurite (Cu3(CO3)2(OH)2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Wonderstone (Banded Rhyolite)
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
igneous