Impressive Turquoise Diamonds Gold Bib Necklace

Impressive 18k white gold bib necklace, featuring turquoise gemstone and approx. 4.50ctw SI/I diamonds.
Necklace is 15 long (wearable length) , center is 2.75 wide.
Marked 750 on the clasp.
Weight - approx. 210 grams.