What Makes A Good Jeweler Is The Diamond Setter–Come See Why At Arman’s Arman, the owner of Arman Diamond Setter, has more than 30 years of experience in the jewelry business, and believes that what makes a good jeweler is the diamond setter. As a business that can design engagement and wedding rings along with bands, pendants, earrings, necklaces, tennis bracelets with precious and semi-precious stone settings, Arman’s is the place to go for a full-service creation or repair.