Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct in the encyclopedia
View all →
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Pegmatite
Pegmatitic Granite
igneous
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Granitic Pegmatite
Pegmatite containing Quartz, Pink Potassium Feldspar, and Muscovite Mica
igneous
Diamond (in Jewelry Setting)
Carbon (C) - Isometric-Hexoctahedral
mineral
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Quartz with Iron Oxide Inclusions
SiO2 with Fe2O3 impurities
Mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Diamond (in jewelry)
Diamond (Carbon, C)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Garnet Gneiss
Gneiss containing almandine-pyrope garnet
metamorphic
Diamond (set in a gold ring)
Carbon (C) - Adamantine cubic carbon
mineral
Quartz (Milky/Yellowish)
Silicon Dioxide (SiO2)
mineral
Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Granitic Pegmatite
Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Druzzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO₂)
mineral
Anthracite Coal
Anthracite (Metamorphosed Coal)
sedimentary
Quartz Crystal with Inclusions
Silicon Dioxide (SiO2)
mineral
Porphyritic Basalt (or Porphyry)
Porphyritic Basalt (Mafic volcanic rock with phenocrysts)
igneous
Rough Ruby (Corundum) in Zoisite Matrix
Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)
mineral
Red Jasper (possibly Brecciated)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper pebble
Jasper (Silicon Dioxide, SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Green Aventurine (Quartz)
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Anthracite Coal
Anthracite
metamorphic
Tiffany Stone
Fluoritized Opal Beryllium Ore (principally Bertrandite, Be4Si2O7(OH)2)
metamorphic
Graphic Granite
Graphic Granite (a variety of Pegmatite)
igneous
Opalite
Man-made opalized glass
mineral
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Diamond
Carbon (C)
gemstone