Diamond Hairpin, also known as Diamond Pin, is part of the Diamond equipment set, and may refer to:
- The weapon from Final Fantasy VII.
- The armor from Dissidia Final Fantasy.
- The armor from Dissidia 012 Final Fantasy.
- The weapon from Final Fantasy Record Keeper.
diamond is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is the birthstone for April.In mineralogy,