The material in these knives is fossilized Woolly Mammoth Bone, from Siberia, and over 10-15,000 years old. Woolly Mammoth Bones were used as construction material for dwellings by both Neanderthals and modern Humans during the ice age. Bones were made into various tools, furniture and musical instruments. Large Bones, such as shoulder bones, were also used to cover dead human bodies when buried.
Mammoth fossils are 150,000+ year old natural material so patterns and colors vary on each knife, No two are the same! These photos are representations of the material, actual products will vary in color and patterns.