THIS IS NATURAL WHITE OPAL MATRIX FOUND IN ANDAMOOKA SOUTH AUSTRALIA.IT HAS BEEN TREATED TO LOOK LIKE EXPENSIVE BLACK OPAL. THE TREATMENT IS PERMENANT BUT IF YOU RE SHAP OR CUT IT YOU WILL HAVE TO RE TREAT IT.

THERE IS NO COLOUR ON THE BACK OF THIS STONE

.THE COLOURS AND FIRE ARE AMAZING.ON THE FIELD THEY CALL THIS CONCRET WHICH IS A HORRIBLE NAME FOR SUCH A BEAUTIFUL STONE.THIS SPECIMEN HAS BEEN SLIGHTLY COATED WITH A LACQUER TO BRING OUT THE COLOURS..WE DO OFFER GEM MATRIX ON THIS SITE WHICH YOU CAN GET A NATURAL POLISH ON IT-THAT SELLS FOR $10 -20 PER CARAT WHILE THIS SELLS FOR LESS THAN$1 PER CARAT FOR LARGER STONES.  6MM=1/4 INCH