I inherited and old set from my grandfather about 10 years ago. Don’t have a picture of the holder/wooden box, but there are initials (J.R.W) on a metal plate on the case and all chips are the following either in blue, red, or white. All same “W” painted in. This was also set aside with some other items from the later 1800s (sword believed to be civil war era). Far from modern and does not feel like clay/ceramic. And too old to be plastic. Any help would be much appreciated! Of course part of me holding out it may be ivory given how old we think it is, but very unsure of how to tell for sure