While Opals can be found all over the world, there is no source as abundant as the Opal fields of Australia. The rich soil and unique geological landscape have favoured the formation of Opals in a full spectrum of colours. The 'play of colour' inside an Opal is a result of light shining through silica spheres inside the precious gem and dispersing. The rarest, and most valuable, is the Black Opal. The dark base colour of black Opals allows the opals 'play of colour' to appear more vibrant and diverse. Mined from the iconic Lightning Ridge Opal fields, this 26.67ct solid Black Opal throws colours in rich hues of green and blue. This Opal is classically set in a halo of Round Brilliant Cut Diamonds, not to detract from the Opal, but to frame its spectacular peacock colour palette.