Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Prehnite
Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2
mineral
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Diorite
Diorite (an intrusive igneous rock)
igneous
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
River Pebble Gravel
Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)
sedimentary
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Blue Spinel on Marble with Phlogopite
MgAl2O4 (Spinel) in CaCO3 (Calcite/Marble) matrix
metamorphic
Diorite
Diorite (Intermediate plutonic rock)
igneous
Liesegang Rings (in Sandstone or Siltstone)
Ferruginous Sandstone with Liesegang Banding
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Diabase (Greenstone)
Diabase (also known as Dolerite)
igneous
Ironstone Concretion (Boji Stone/Moqui Marble type)
Goethite/Hematite-encrusted Sandstone Concretion
sedimentary
Dalmatian Stone (often misnamed Dalmatian Jasper)
Aplite (with hornblende/arfvedsonite inclusions)
igneous
Vesicular Basalt
Vesicular Basalt
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt with Weathering Rind
Mafic Volcanic Rock (Primarily Plagioclase and Pyroxene)
igneous
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous
Greenstone (Greenschist)
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Quartz Crystal Cluster on Matrix
Silicon Dioxide (SiO2)
mineral
Flower Agate
Chalcedony (SiO2) with Opaque Spherulitic Inclusions
mineral
Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Jadeite Jade
Jadeite (NaAlSi2O6)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral