Nice 3 Pieces Set of 2.44 Cts. Aust. Black Opal Doublet, 

Lightning Ridge, 

Loose Stone

Carats: 2.44 Cts. 

Size in MM: 8 x 6 x 2 mm Thick.

Shape: Oval Shape as shown in the photo.

Stone Name: Natural Genuine Opal Doublet Loose Stone.

5B.