Boulder opal 'split' from the 'Koroit' opal field (QLD).  The centre has transparency with green and blue colours in the dark and light iron stone host rock.  The free form shaped opal is 10 x 20 mm in size and setting is 9kt yellow gold in an impressive earring design which enhances the unusual opal. The 2pt diamonds add a little sparkle!
The earrings are 12 mm wide and 44 mm in total length and have  combined weight of 8.5 gram.