Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
mineraloid (man-made)
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Opalite
Synthetic Glass (Simulated Opal)
mineral
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
mineral-based composite
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Libyan Desert Glass
Libyan Desert Glass (SiO2 with trace elements)
mineral (impactite)
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Synthetic (glass)
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
mineral
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Lava Rock with Fabric Impression
Scoria or Basalt with anthropogenic impressions
igneous
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
Anthropogenic (Man-made artifact)
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
metamorphic (man-made)
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass