ALL COLLECTIONS › Moonstone Necklace Image 1 of 1 Moonstone Necklace $4,600.00 Bright faceted moonstone roundels with overtones of blue with 18K spacers, hook & ring clasp.Approx: 18 3/4" L x 5/16" W. Add To Cart Added! Bright faceted moonstone roundels with overtones of blue with 18K spacers, hook & ring clasp.Approx: 18 3/4" L x 5/16" W.