Orange Calcite
Calcium Carbonate (CaCO3)
mineral
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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Epidosite
Epidosite (Metasomatic calcium-aluminum silicate rock)
metamorphic
Red Shale
Lutite (primarily composed of clay minerals and iron oxides like hematite, Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with Manganese staining)
Arenite (composed primarily of SiO2)
sedimentary
Quartz with Iron Oxide Monzonite or Sandstone contact
Quartz (SiO2) with Limonite/Hematite staining
mineral
Porous Quartzite
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Stichtite in Serpentine (Atlantasite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
Metamorphic rock / Mineral variety
Green Tiger's Eye
Silicified Crocidolite (Quartz variety, SiO2)
metamorphic
Flower Agate
Chalcedony (SiO2) with Platy inclusions
mineral
Tree Agate (also known as Dendritic Agate)
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
mineral
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Septarian Nodule
Septarian Nodule (Mixture of Calcite, Aragonite, and Limestone/Clay)
sedimentary
Agate
SiO2 (Silicon dioxide, chalcedony variety)
Mineral
Dalmatian Jasper
Dalmatian Stone (comprised of Feldspar, Quartz, and Arfvedsonite)
igneous
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
igneous
Fossiliferous Limestone (Coral Rag)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Greywacke (Sandstone)
Lithic wacke
sedimentary
Geode (unopened)
Quartz-filled Geode (SiO2)
sedimentary
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Ironstone Concretion (Moqui Marble type)
Iron oxide concretion (Goethite/Hematite and Sandstone)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock including secondary mineral infills)
Igneous
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Peridotite
Peridotite (varieties include Dunite, Lherzolite, Harzburgite)
igneous
Red Sandstone (with possible iron oxide staining)
Sandstone (primarily Quartz with Hematite/Goethite cement)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite with Quartz Vein
Quartzite (primarily SiO2)
metamorphic
Limonite-stained Quartz / Quartzite
Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)
sedimentary or metamorphic
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Granodiorite (River Cobble)
Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Greenstone (Epidote/Chlorite Schist)
Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Orthoclase KAlSi3O8, and Plagioclase NaAlSi3O8 to CaAl2Si2O8)
Igneous
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral