IOD Unicorn Decor MouldMaterials: Silicone Iron Orchid Designs IOD Unicorns 6x10 Decor Mould 6x10 Decor Mould. Introducing the Unicorns Mould, a regal nod to Renaissance Italian architecture and the lavish flourishes of baroque art. This mould emulates the mythical beauty of unicornslong celebrated as symbols of virtue, royalty, and spirituality. Unicorns have graced art for centuries, with their symbolism woven into history. They were often depicted as representations of