Ivory is a hard, white material from the tusks and teeth of animals. Elephant ivory is the most important source, but ivory from mammoth, walrus, hippopotamus, sperm whale, killer whale, narwhal and wart hog are used as well. A bone is a rigid organ that constitutes part of the vertebral skeleton. source: Wikipedia Note that many ancient dice are NOT numbered in the standard (1-6, 2-5, 3-4) way. |