Plagioclase Feldspar (specifically Albite/Oligoclase)
(Na,Ca)(Si,Al)4O8
mineral
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
igneous
Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Orthoclase Feldspar (Salmon variety)
Orthoclase, KAlSi3O8
mineral
Quartz
Quartz (SiO2)
Mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
metamorphic
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz, SiO2)
sedimentary
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic
Bumblebee Jasper
Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)
mineral
Schist
Mica Schist (Quartz-Muscovite-Biotite Schist)
metamorphic
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Serpentine
Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4
metamorphic
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Granite (with Orthoclase and Quartz)
Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)
igneous
Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Schist (Micaceous)
Mica Schist
metamorphic
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
mineral
Desert Rose (Gypsum Variety)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Red Chert (Jasper)
Chert / Microcrystalline Quartz (SiO2)
sedimentary
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Nuummite
Orthorhombic amphibole (Gedrite and Anthophyllite mixture) - (Mg,Fe)7Si8O22(OH)2
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Unakite
Epidotized Granite
metamorphic
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
igneous
Marble
Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.
Metamorphic Rock