The chain is a 18K yellow gold paperclip chain necklace, which is a type of chain made up of oval links that are connected at a 45-degree angle.

The paperclip chain necklace is a popular choice for everyday wear, as it is both stylish and versatile. It can be dressed up or down, and it looks great layered with other necklaces. The 14K yellow gold material is also a good choice for people with sensitive skin, as it is less likely to cause irritation than other metals.