14K Yellow Gold 8mm Wide Wedding Band With Elysium Inlay. This unique mens wedding band is a total of 8mm wide and made of polished 14K yellow gold with a 5mm Elysium inlay. Elysium is diamond, not metal, it contains black diamond pressed into one solid diamond band. This band has a flat style and grooved edge with polished finish, available with several other finish options. Also available in rose and white gold. Designed and manufactured in the USA by Lashbrook Designs, this ring can be customized for any width, finish or metal. Comes with a Lifetime guarantee against defect. Elysium is made of 100% diamond, and is 4X harder than tungsten carbide, and 40X harder than gold.