Sapphire
Corundum (Al2O3)
mineral
Category
Igneous, Sedimentary, Metamorphic, Mineral
Browse igneous, sedimentary, metamorphic, mineral specimens identified by the Rock Identifier community.
Learn about Igneous, Sedimentary, Metamorphic, Mineral in the encyclopedia
View all →
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Gneiss Pebble
Gneiss (Metamorphic Foliated Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)
metamorphic
Gneiss Pebble
Gneiss
metamorphic
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)
Silicon Dioxide (SiO2) with various inclusions
mineral
Aventurine (Green Quartz)
Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Gneis
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphism)
metamorphic
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
River Rock (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneiss)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
sedimentary
Pink Granite Gneiss
Granitic Gneiss
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Common Quartz Pebble
Silicon dioxide (SiO2) rock fragment
sedimentary
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Greenschist
Chlorite Schist
metamorphic
Feldspathic Gneiss
High-grade Metamorphic Rock (Gneiss)
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss
metamorphic
Granite Gneiss
Gneiss (quartz-feldspar dominated)
metamorphic
Granite Gneiss
Felsic Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Banded Gneiss
Gneiss
metamorphic
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
River Pebble (Gneiss / Granitic Schist)
Metamorphic Rock (Quartz-Feldspar-Mica assembly)
metamorphic
Pink Gneiss / Pink Granite Gneiss
Felsic Gneiss (dominated by Orthoclase Feldspar and Quartz)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic