Ruby in Matrix
Corundum (Al2O3)
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Clear/White Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Goethite
Goethite (FeO(OH))
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Diamond (Uncut Crystal)
Carbon (C)
mineral
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Red Sandstone
Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)
sedimentary
Epidotite (Unakite variety)
Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Beach Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Mica Schist
Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)
metamorphic
Diorite
Plutonic Igneous Rock (Intermediate Composition)
Igneous
K2 Jasper (Beads)
Granodiorite with Azurite and Malachite
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartzite with Feldspar
Quartzite (mainly SiO2) with inclusions of Potassium Feldspar (KAlSi3O8)
metamorphic
Serpentinite
Serpentinite (containing minerals of the Serpentine subgroup: Antigorite, Lizardite, and Chrysotile; formula (Mg,Fe)3Si2O5(OH)4)
metamorphic
Granite
Phaneritic plutonic rock (primarily Quartz, Alkali Feldspar, and Plagioclase)
igneous
Marble
Metamorphosed Limestone/Dolomite
metamorphic
Basalt with Scoria
Amygdaloidal Basalt / Vesicular Basalt
igneous
Yellow Quartzite
Metamorphosed Quartz (SiO2)
metamorphic
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Mineral
Pink Granite
Felsic Intrusive Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sapphire (Corundum)
Corundum (Al2O3)
mineral
Diorite
Phaneritic intermediate plutonic rock
Igneous
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral with metamorphic or sedimentary host
Quartzite
Quartzite (primarily SiO2)
metamorphic