BVLGARI Rare tubogaz steel necklace adorned with square

BVLGARI
Rare tubogaz steel necklace adorned with square
pattern in 18k yellow gold (750‰) set with
amethysts, tourmalines, calibrated aquamarines and
small diamonds
Signed, numbered 2337AL
Interior diameter: 13,5 cm (adjustable)
Gross weight: 104,2 g
Original signed case