Materials Gemstone Gemstone: Opal Dimensions Necklace length: 45 Centimetres Stone Color: Blue Stone Dimension : 2MM-5 MM Stone Treatment:Heat Origin:Ethiopia Stone shape :Plain Rondelle LENGTH: 18" (45 CM) Necklace Carat Weight : 36 (Approx.) Silver Carat Weight:3.8 Closure: Lobster claw 8 MM