Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
mineraloid / industrial byproduct
Category
Browse anthropogenic mineral mimic specimens identified by the Rock Identifier community.
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions