Natural black opal Australian solid opal diamond 18k gold pendant

This is a rara size black opal, only available from Austrlia.
Huge 11.37ct Australia Solid Black Opal Diamond 18K Rose Gold Luxury Pendant
Australia black opal 18K rose gold pendant(18K gold is 75% solid gold, AU750)
No.213056 #
Pendant size:approx. 47x26.2x6.5mm
Weight(pendant weight): 41.3cts
Black opal:approx.. 24.5x15x4mm
Black opal weight:11.37cts/1pc
Diamond
Round brilliant cut, approx..0.225cts/38pcs
The gemstones weight and AU750 were stamped on the pendant