Dzi Beads

I have had these beads for 23 years and didn't realize their cultural or monetary worth until my Nepali friend was wearing a fake one and it piqued my curiosity. After years of making necklaces for friends I only have four left.. They are all four the same, one had a nick out of it and another looks as if the end has been worn away. I think they are heaven and earth pattern with four eyes. 

Fair