Large 51.3ct Lightning Ridge Dark Crystal Opal Rub/Rough Blue Fires Australia

I have for sale a Large 51.3cts Lightning Ridge Opal Rub/Rough Specimen from Australia. This one is 41x22x9mm. The 9mm thickness is due to the stone being slightly curved, maintaining 9-10mm throughout. It is a Dark Crystal Opal, Clear Amber Crack Free Opal when held to light with Blue/Purple Fires running through it. Thick Colour bars here, Fires over most of the top fcae, with some potch still to be rubbed down. It wil make a Huge Pendant stone, or cut into multiple smaller Crystal cabs. Selling at under $8/ct Au . Thanks for looking....