Children's Rings: Surgical Steel, Gold IP, Clear AAA CZ Rings Size 3

For children from perhaps age 2 or 3, these size 3 rings are encircled with sparkling clear cz and are also available in size 7, 6, 5 and 4. What is gold IP?  "To begin with, a layer of titanium nitride is added to the base surface of stainless steel. Additionally a final plating metal (gold) is added to the surface; the thickness of this layer is no more than 0.3 urn. ... Given its durability and chemical stability, ion plating is rightly called “permanent” coating.