Diamond And Ruby Necklace In 18k Yellow Gold

The necklace features ruby and diamond centerpiece, crafted in platinum topped 14k gold, mounted on 18k yellow gold curb link chain, equipped with the box clasp and two fold over safety latches. 
Center set with AGL Certified 3.15ct oval cut ruby, AGL Report# 1151922, stating that the ruby is of Thai origin, with minor treatment, surrounded by diamonds.

Diamonds: 
18 round brilliant cut diamonds
Total weight: approximately 2.55ct
Color: H-I
Clarity: SI-I

Measurements of the center piece: 28mm by 18mm.
Chain Width: 7.3mm.
Length: 16.25 inches.
Weight: 77.6 grams.

Ref# 510-000-1086