Thin Organic NecklaceA beautiful boho prehistoric woolly mammoth tusk necklace perfect for layering or worn alone. Each fossil necklace is a one of a kind and may vary from photographed piece. Note necklace does not have a clasp. 24 long, no stretch, meant to be put over the head and worn. Mammoth ivory is found in the cold northern region of Alaska, Canada, Russia, and Siberia, and may range in age from 10,000 to 200,000 years. Colors vary in natural and neutral shades