Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
mineral
Category
Igneous, Sedimentary, Metamorphic, And Mineral
Browse igneous, sedimentary, metamorphic, and mineral specimens identified by the Rock Identifier community.
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Rose Quartz
Silicon dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Anthracite Coal
Anthracite
metamorphic
Anthracite Coal
Anthracite (Carbon Content: 86%–98%)
metamorphic
Citrine
Quartz (SiO2) - variety Citrine
Mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Schist
Mica Schist
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Granite Gneiss or Granitoid River Rock
Granitoid / Gneiss
Metamorphic or Igneous
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Quartzite
Quartzite
Metamorphic
Quartz on Greenstone
Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit
metamorphic
Yellow Quartzite or Yellow Jasper
Quartzite (primarily SiO2 with Iron oxide staining)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
Mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Jasper and Quartzite Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary/metamorphic
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Granite
Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)
igneous
Slate
Foliated low-grade metamorphic rock
metamorphic
Anthracite Coal
Anthracite
metamorphic
Phyllite
Phyllite
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Mn2+SiO3)
mineral
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Quartzite
Quartzite (consisting primarily of SiO2)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite River Stone
Quartzite (primarily SiO2)
metamorphic
Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Quartz-veined Metamorphic Rock
Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)
metamorphic