Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Category
Man Made Material, Not A Natural Rock Or Mineral Specimen
Browse man made material, not a natural rock or mineral specimen specimens identified by the Rock Identifier community.
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Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
mineral
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Blue Obsidian (Cullet Glass)
Man-made silicate glass
mineral
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Blue cabochon, likely dyed or synthetic material
Undetermined; possibly dyed chalcedony (SiO₂), glass, or synthetic corundum
gemstone
Slag
Metallurgical Slag
igneous
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Blue opal heart cabochon
Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite
gemstone
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Blue Goldstone
Aventurine Glass
man-made glass
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Blue glassy mineral specimen, possibly dyed or synthetic
Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass
mineral
Black glassy fragment, likely obsidian or industrial glass
Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image
mineral
Blue glassy fragment among beach gravel
Likely cobalt-blue man-made glass; not a natural mineral specimen
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
mineral
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Green glassy slag (often sold as “sea glass” or “green obsidian”)
Industrial vitreous slag; primarily amorphous silicate glass, composition variable
mineral
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Opalite
Synthetic Opalized Glass
mineraloid (man-made)
Asphalt Chunk
Asphalt concrete
man-made composite
Diamond
Native Carbon (C)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid