PRISTINE ROUGH RUB STRAIGHT OFF MINER FROM CAMP SITE IN LIGHTNING RIDGE AUSTRALIA. THIS ROUGH IS DIRECT FROM THE MINER EXPOSING GOOD COLOUR. .WE HAVE BEEN CUTTING OPALS FROM THIS MINE FOR 3 YEARS AND IS REGULAR SUPPLY. WE FIND THIS BLUE OPAL ON NATURAL BLACK CUTS GOOD BLUE OPALS AND OVER THE YEARS WE HAVE CUT THOUSANDS OF BLUE STONES  AND FIND  APPROX 25 % CUTS ELECTRIC BLUE ,25% GOOD  BLUE , 25% AVERAGE BLUE AND 25% DULL BLUE ,BUT IT IS HARD TO TELL BEFORE YOU CUT WHICH IS ELECTRIC BLUE COLOUR..WE GUARANTEE OUR OPALS BUT IF YOU WIN AND SNIP OR POLISH OPAL IS YOURS. RESERVE PRICE IS LOWER THAN PRICE AT LIGHTNING RIDGE. GOOD LUCK.THIS OPAL WEIGHS 41 CARATS AND IS 10 MM THICK.HAVE FUN CUTTING!