Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
Category
Browse man made material (metal) specimens identified by the Rock Identifier community.
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
Asphalt Pavement (with aggregate)
Asphalt concrete
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
Diamond
Native Carbon (C)
Diamond
Carbon (C)
Diamond
Carbon (C)
Native Silver
Silver (Ag)
Green Agate
Silicon dioxide (SiO₂)
Coquina
Bioclastic Limestone
Diamond (in a jewelry setting)
Cubic Carbon (C)
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
Hematite
Iron(III) oxide (Fe2O3)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
Gold
Native Gold (Au)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Note on Image Identification: Textile
N/A (Anthropogenic material)
Slag Glass
Silicon dioxide with impurities
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
Slag
Diamond
Native Carbon (C)
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
Sea Glass
Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
Quartz-bearing Pegmatite with Metallic Sulfides
Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica
Chert (Flint)
Silicon dioxide (SiO2)
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Slag (Industrial Glass)
Artificial Vitreous Silicate
Pallasite Meteorite
Pallasite (Stony-Iron Meteorite)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4