NOS Handcrafted Aurora Opal necklace 925 Sterling silver

Part of my New/Old Stock inventory purchased few years ago. 925 Sterling silver 16-18 inch long. (2” extension) with hook closure. The color changing stone is a man made Aurora Opal, shown in different light to show the changing colors. The small bar shaped pendant measures about 3/4” by 1/2” wide. Any signs of surface wear and patina are from storage, this item was never worn. Total weight is 7.18 gr