Sterling Silver Marcasite Red Glass Heart Earrings and Curb Chain Pendant Necklace Jewelry Set Sterling silver pendant and earring set featuring heart shaped red glass and Marcasite. Sterling silver 18" Curb Chain. Spring ring clasp. Marcasite can appear iridescent in the light. The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture. Imported