THE BRIGHTNESS CHART GUIDE CHART IS A VALUABLE BUYING TOOL IN THAT IT ALLOWS YOU TO GUAGE THE BRIGHTNESS MORE ACCURATELY THAN THE PICTURE OF THE OPAL WHICH CAN BE ENHANCED.NOW YOU CAN COMPARE STONES BETWEEN SELLERS WHO USE THE BRIGHTNESS CHART.

SEDA OPALS OWNER, PAUL SEDAWIE, IS THE CURRENT PRESIDENT OF THE OPAL ASSOCIATION INC. THE ASSOCIATION HAS PRODUCED A BRIGHTNESS CHART WITH 10 STONES ATTACHED .THERE ARE 5 WHITE OPALS AND 5 DOUBLETS SO YOU CAN COMPARE OPALS FROM MOST FIELDS.THE DOUBLETS CAN BE USED FOR BOTH BOULDER AND BLACK OPAL. THE IDEA IS TO MOVE THE CARD TO SEE THE STRONGEST FIRE FROM THE STONE -THIS IS THEN THE BRIGHTNESS RATING.

NOTE THIS CHART DOES NOT TAKE IN TO ACCOUNT THE DIRECTION OF FIRE FROM THE STONE . THE PRICE OF OPAL IS DETERMINED BY BODY TONE , BRIGHTNESS, COLOUR, PLAY OF COLOUR, SIZE AND ALLOWING FOR DEDUCTIONS FOR FAULTS AND INCLUSIONS. THE CHART IS 60 X 130 MM (6 MM = 1/4 INCH). THE STONES ON THE CARD VARY FROM 6 X 4 TO 7 X 5

 PART OF THE PROCEEDS OF THIS SALE GOES TO THE OPAL ASSOCIATION