Adjustable Black Crystal Necklace Set The perfect accessory for any outfit! This adjustable black crystal necklace set is versatile and stylish, adding a touch of elegance to any look. With its adjustable length, it can be worn as a longer necklace, making it perfect for any occasion. Plus, the sparkling crystals are sure to catch the eye and make you stand out in the best way possible. Upgrade your jewelry collection and elevate your style with this stunning necklace set.