Slag Glass
Glassy Silicate Residue
industrial byproduct
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Processed Metal) in the encyclopedia
View all →
Native Copper with Cuprite and Quartz
Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Polished dendritic agate or jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions
mineral
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Shale with Quartz Veins
Fissile Sedimentary Rock (SiO2)
sedimentary
Rhyolite
Extrusive igneous rock (felsic)
igneous
Diamond (in jewelry)
Carbon (C)
mineral
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Small brown mineral/rock fragment
Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Beryl (likely Aquamarine or Green Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,IV)4O10(F,OH)2
mineral
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Gossan (with Limonite and Hematite)
Gossanous iron-oxide rock (Fe2O3 · nH2O)
sedimentary
Tiger’s eye beads
Tiger’s eye (quartz variety), SiO₂, with pseudomorphic fibrous crocidolite/goethite inclusions
mineral
Yellow chalcedony (likely lemon agate or yellow jasper)
Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony
mineral
Banded Agate Coaster
Silicon Dioxide (SiO2) - Variety Agate / Chalcedony
mineral
Granite
Granitoid (dominated by Quartz and Feldspar)
igneous
Quartz-bearing Pegmatite with Metallic Sulfides
Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica
igneous
Sandstone (with Iron Staining)
Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)
sedimentary
Tumbled Tiger’s Eye
Quartz variety, fibrous SiO₂ with crocidolite pseudomorphs
mineral
Tumbled quartz (likely milky/rose quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Dyed mineral cluster, likely calcite or aragonite
Calcite (CaCO₃) or aragonite (CaCO₃), artificially color-enhanced
mineral
Likely tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), potentially hematite/goethite-bearing
mineral
Green sea glass (likely slag glass or bottle glass)
Man-made soda-lime silicate glass; not a naturally occurring mineral
mineral
Black tourmaline (schorl) on quartz matrix
Schorl, NaFe3Al6(BO3)3Si6O18(OH)4, commonly associated with quartz (SiO2)
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety
mineral
Green glassy slag or manufactured glass bead
Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Iron Slag
Iron smelting byproduct (Glassy/vesicular silicate)
anthropogenic / industrial byproduct
Tumbled carnelian (likely)
Cryptocrystalline chalcedony, SiO₂; orange-red variety commonly called carnelian
gemstone
Black tumbled stone, likely obsidian
Volcanic glass; chiefly amorphous SiO₂
igneous
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary