Blue Sapphire
Corundum (Al2O3)
mineral
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Grey Agate
Silicon Dioxide (SiO2) - variety: Agate/Chalcedony
mineral
Smoky Quartz
Quartz (Silicon Dioxide), Formula: SiO2
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Sandstone
Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)
Sedimentary Rock
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Jade (Jadeite/Nephrite)
NaAlSi2O6 (Jadeite) / Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite)
metamorphic
Cloud Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
metamorphic
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
sedimentary
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Sandstone (Siltstone/Mudstone variety)
Ferruginous Sandstone (composed primarily of Quartz with Hematite cementation)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Diorite (River Rock/Cobble)
Intermediate Plutonic Igneous Rock (Diorite)
igneous
Quartz / Quartzite
Quartz (Silicon Dioxide, SiO2)
metamorphic
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Mica Schist
Foliated Metamorphic Rock (rich in Muscovite or Biotite)
metamorphic
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
metamorphic
Blue Dumortierite Quartz
AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of iron oxide)
metamorphic
Rough Star Sapphire (Corundum)
Al2O3 (Aluminum Oxide)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz Sphere
Quartz (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Sapphire (Corundum)
Corundum (Al2O3)
mineral
Jade (likely Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
Greenstone (metamorphosed basalt)
Greenschist / Meta-basalt
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral