Akoya pearl & 18K diamond, ruby clasp necklace

This is a German graduated hand-knotted Akoya pearl necklace. The pearls are 5mm- 10mm in diameter and 22 inches in length. The clasp is made of 18K white gold, rose cut rubies and European cut diamonds. Stamped 750 for 18K gold and JKA. All the diamonds were tested for heat conductivity with the Diamond Selector II. One of the rubies has a tiny chip on it but is firmly set and won’t come off. The whole necklace weighs 28.8 grams and the clasp weighs about 6.8 grams. In excellent condition.