BC jade beads are a beautiful, mossy, medium-green color. The "B.C." stands for British Columbia, which is where real BC jade (a true nephrite jade) is mined. There is an ample supply of this nephrite jade in the Canadian mines, and stock that we know to be actual British Columbian jade, we have labeled with a "C" (for Canada) at the end of the stock number.
The beads labeled "BC jade" (without the C in the stock number) are more likely to be "new jade" (a serpentine), dyed "white jade", or "Taiwan jade" (another true nephrite jade). Without extensive testing, it is difficult to tell the difference between these stones.