Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Category
Browse man made material (metal) specimens identified by the Rock Identifier community.
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Hematite
Iron(III) oxide (Fe2O3)
Tiny metallic-looking mineral or rock fragment
Unidentifiable from the image; possibly a small metallic mineral grain
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
Turquoise-colored bead on a metal earring
Unidentified blue-green bead; possibly turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), but the image cannot confirm its material
Small clear crystal, possibly quartz or glass-like gemstone
Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia
Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia
Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)
Ornamental ring with likely blue sapphire and diamonds
Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Orange cabochon ring
Possibly carnelian (microcrystalline quartz, SiO₂); identification from the photograph is uncertain.
Likely green aventurine or nephrite jade ring
Aventurine quartz (SiO₂) or nephrite, a variety of tremolite–actinolite amphibole
Blue tumbled glass-like specimen; likely blue slag glass
Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image
Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)
Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
Diamond
Native Carbon (C)
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
Clear quartz crystal pendant
Quartz (silicon dioxide, SiO₂)
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Clear faceted gemstone in a metal jewelry setting (likely imitation glass or cubic zirconia)
Unidentified transparent faceted stone; possibly cubic zirconia (ZrO₂) or glass
Iron-rich meteorite fragment (probable stony-iron or iron meteorite)
Unclassified Fe–Ni meteorite; possible weathered iron meteorite
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
Small gold-colored jewelry piece with clear stones
Likely a metal setting holding small faceted gemstones; the stones cannot be identified from the image.
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
Green aventurine bead bracelet
Quartz (SiO₂), typically green quartzite/aventurine colored by fuchsite mica or other inclusions
Industrial slag (iron/copper smelting slag)
Multiphase vitreous metallurgical slag; commonly iron-silicate glass with metal-oxide and metallic inclusions
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Faceted purple-blue beads, likely synthetic glass or treated gemstone
Indeterminate; possible synthetic corundum, synthetic spinel, or dyed quartz (SiO₂)
Olivine
(Mg,Fe)2SiO4
Faceted pink gemstone beads (possibly tourmaline)
Unidentified pink gem material; appearance may be consistent with pink tourmaline (elbaite), but the image is insufficient for confirmation
Meteorite
Chondrite / Iron-Nickel Meteorite fragment
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
Turquoise ring
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the setting appears to be silver-colored metal
Colorless faceted quartz-like gemstone
Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia
Faceted clear gemstone in a metal setting
Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.
Gemstone ring (stone not identifiable)
Unknown; the small central stone may be a colorless gemstone or glass, and the surrounding metal is gold-colored alloy
Likely clear quartz crystal or glass-like gemstone
Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Likely small metallic meteorite fragments
Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image
Lepidolite Granite
Granite with lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2)
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions