Marcasite: Sterling silver marcasite jewelry affords elegance, panache, sophistication, and a dashing sense of style exhibited by no other category of silver jewelry. In particular, the marcasite ring collection at Plum Island Silver is teeming with marcasite rings sporting gemstones from the entire globe such as blue topaz, garnet, and the frequent appearance and pairing of black onyx as it lends a refinement and steely taste of the avant-garde. Marcasite rings are available in standard women's sizes spanning from 4 through 9, and communicate richness and opulence through the diverse styles ranging from elite silver cocktail marcasite rings to more sedate.