Note that no strong light has been used yet however in my view and comparing it to the hilt at
http://www.vikingsword.com/vb/showthread.php?t=14878 on post 1.. just press the link and it pops up... post 1 shows a royal khanjar the hilt clad with silver and invariably the material is rhino oddly called
zraf al afrique though sometimes called the one with the horn ~
wahid al garn . Thus this weapon shows a rhino hilt somewhat splodged with what appears to be black paint or oil..
Take a plough through
The Omani Khanjar thread above for examples of most of the Omani styles of this traditional weapon and badge of office as head of the family. With free ink thrown in comments are completely free...