LAPIS LAZULI IS A BLUE STONE WITH WHITE MARKINGS THROUGHOUT.THESE MARKINGS VARY FROM GEM TO GEM.THE BLUES VARY IN INTENSITY FROM AREA TO AREA.AFGHAN GEMS ARE HIGHLY PRIZED FOR THEIR DEPTH OF BLUE AND THEIR WHITE MARKINGS FOR CONTRAST.THE USE OF THIS GEM MATERIAL GOES BACK MANY THOUSANDS OF YEARS.MEASURES 24.16X15.73X6.92MM.OVAL CAB CUT.