Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Category
Anthropogenic Material (Man Made Rock)
Browse anthropogenic material (man made rock) specimens identified by the Rock Identifier community.
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Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Sea Glass
Man-made vitreous material
mineral
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Blue opalite glass cabochon (likely imitation opal)
Man-made opalescent glass; not a natural mineral
gemstone
Concrete-like aggregate surface with embedded rock fragments
Anthropogenic concrete or exposed aggregate; not a natural rock specimen
sedimentary
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Goldstone
Aventurine Glass (Man-made)
mineral
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Not a rock, mineral, or geological specimen
N/A
Polished opalite (likely man-made opalescent glass)
Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass
mineral
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
mineral
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Blue crystal pendant (likely blue glass or synthetic crystal)
Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral
gemstone
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Asphalt Chunk
Asphalt concrete
man-made composite
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Sea Glass (specifically Frosted White)
Amorphous Silica (substance: Sodium-calcium silicate glass)
Mineraloid (Anthropogenic/Man-made rock)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Polished black pebble, likely basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)