Opalite
Synthetic Glass (Silica-based)
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Opalite
Synthetic Glass (Silica-based)
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
Polished brown jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
Clear quartz crystal (likely)
Quartz, silicon dioxide (SiO₂)
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
Opalite
Synthetic Glass (Simulated Moonstone/Opal)
Opalite
Synthetic Glass (Simulated Opal)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
Slag
Metallurgical Slag
Blue Obsidian
Volcanic Glass (Silica, SiO2)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
Polished gemstone tower assortment
Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones
Opalite
Synthetic Opalized Glass
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Slag
Glassy silicate byproduct (anthropogenic material)
Opalite (Synthetic Moonstone/Opal)
Synthetic Silica Glass
Aluminum Slag
Anthropogenic Aluminum (Al)
Carved opalite pendant
Opalite (man-made opalescent glass; not a natural mineral)
Dyed Agate / Painted Stone
Silicon Dioxide (SiO2) with artificial pigment
Concrete Fragment
Hardened Portland Cement Composite
Quartz crystal (likely clear quartz)
Quartz, silicon dioxide (SiO₂)
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Blue Goldstone
Man-made glass with cobalt and metal flecks
Conglomerate
Conglomerate Rock (Paraconglomerate)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
Opalite
Man-made Glass (Synthetic Opalized Glass)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
Opalite Egg
Synthetic Glass (Simulated Opal)
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Opalite
Opalescent Glass (SiO2 + coloring agents)
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)