Banded Agate (Tumbled)
Agate (Variety of Chalcedony/Quartz), SiO2
mineral
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Carnelian
Carnelian (SiO2 - Chalcedony colored by Iron Oxide)
mineral
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Chert (Septarian Concretion/Nodule)
Microcrystalline silica (SiO2) with carbonate mineral veining
sedimentary
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2-rich)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
mineral
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Blue Quartzite (Dyed)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Chrysoprase
Chrysoprase (a variety of Chalcedony, SiO₂)
Mineral
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
sedimentary
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
mineral
Rutilated Quartz
SiO2 (Quartz) with TiO2 (Rutile inclusions)
Mineral
Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Unknown Rock Specimen
igneous
Blue Quartz (Dumortierite Quartz)
Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)
mineral
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Green Aventurine
Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions
Mineral
Red Jasper (with Quartz inclusions)
Silicon Dioxide (SiO2)
sedimentary (physico-chemical)
Sandstone (Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide cement (primarily Fe2O3 • nH2O)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose type)
Arenite (primarily SiO2)
sedimentary
Serpentine
Serpentine-group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary