Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Travertine (Calcareous Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Rhodonite in Quartz Matrix
Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)
mineral
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
sedimentary
Nuummite
Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)
metamorphic
Mica Schist with Garnet
Garnetiferous Mica Schist
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Moqui Marble)
Iron Oxide Concretion (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Blue Lace Agate (Banded Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
White Marble
Recrystallized Calcite (CaCO3) / Marble
metamorphic
Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Shale with Iron Oxide Staining
Fissile Mudstone (primarily clay minerals and quartz)
sedimentary
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic