HERE,THERE ARE MANY NICE SOLID GEMS PIECES OF CRYSTAL OPAL IN BOTH OVAL AND PEAR SHAPES[MAINLY OVALS] SOLD IN 5CT PARCEL LOTS.DIFFERENT COLOURS ABOUND IN MOST GEMS.AN ASSORTMENT THAT YOU WILL WELL USE IF YOU NEED OPAL STONES.AVERAGE GEM WOULD BE 1.5CT.SOLD AS PRICE PER CARAT. INDIVIDUAL GEMS CAN BE BOUGHT AT A SMALL PREMIUM. WE HAVE 350CTS CURRENTLY AVAILABLE.