1. Processing cost: The processing cost of narwhal teeth is relatively low. Although its tooth texture is hard, it can be processed by modern processing equipment and technology, which makes the processing cost relatively low, thus reducing the value of narwhal teeth.

2. Market demand: The market demand for narwhal teeth is relatively low. Because of its appearance and texture, narwhal teeth are not suitable for making decorations or jewelry. Therefore, compared with other materials, the market demand of narwhal teeth is relatively small and its value is relatively low.