A PERUVIAN OPAL, PERIDOT AND TURQUOISE NECKLACE, SYLVIA GOTTWALD. Featuring five graduating strands of faceted Peruvian opal with peridot bead spacers, attached to a 19th century micro-mosaic turquoise clasp of stylized heart form, lg. 16 1/2 in to 21 in. Estimate $1,200-1,500