Ark Angel Alchemy 65ct. Larimar, Rainbow Moonstone and Blue Topaz 18" Necklace with Extender- Free Silver Gift Box 100ct.t.w. Rainbow Moonstone, Larimar and Blue Topaz 18" Necklace with 2" extender. Total necklace length, 20". Weight is 20 grams. The central, rainbow moonstone is 20 x 9 mm and the central, larimar teardrop stone is 9 x 14 mm. The square, blue topaz stones are 9 mm wide. * The gemstone width of the necklace is 124 mm or 4.88".* Handmade, Polished Finish, Excellent Quality, Meticulous Detail Free Silver Gift Box