Close-up of an 18k yellow gold necklace with red spinel rondelle beads.

Spinel Jewelry

Spinel's luscious looks are frequently confused with sapphire and ruby, as they are commonly found in reds and pinks, and purple-to-grey/blue. Jewelry quality spinel is made up of a subsection of a mineral group that shares the same crystal structure. Spinel is a new addition as the birthstone for August.