Quartzite
Quartzite (SiO2)
metamorphic
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct in the encyclopedia
View all →
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion (SiO2 + Fe2O3)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 inclusions)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
André Landed Here Rock (Glacial Erratic)
Granodiorite / Diorite (compositional estimate)
igneous
Kyanite (Blue Kyanite)
Kyanite (Al2SiO5)
mineral
Blue Sapphire (Ceylon)
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Feldspar-rich Quartzite
Feldspathic Quartzite (Metamorphosed Sandstone)
Metamorphic
Agate (Sliced Nodule)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Porphyritic Andesite (often called Chinese Writing Stone)
Porphyritic Basaltic Andesite with Feldspar Phenocrysts
igneous
Quartzite (specifically an iron-stained or Carnelian-colored variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Titanium, Manganese, or Iron
mineral
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Rose Quartz
Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)
mineral
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Quartzite
Quartzite (mostly SiO2)
metamorphic
Green Agate
Silicon dioxide (SiO₂)
mineral
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Red Jasper
Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)
sedimentary
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Mineral
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
metamorphic
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Rose Quartz
Silicon dioxide (SiO2) with trace impurities of titanium, iron, or manganese
mineral
Anthracite Coal
Anthracite (Carbon-based sedimentary-derived metamorphic rock)
metamorphic
Biotite Schist
Biotite Schist
Metamorphic
Citrine
Quartz (SiO₂)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
metamorphic
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic