Omani Jambiya for comments

[Atlantia]

Originally Posted by freebooter

Gene, have a little look closer at the surfaces and cross section of surfaces..
The info below may help you work it out as you have the piece in hand.

The initial image showed a good possibility of marine ivory especially with the fluted waist. Your follow up images also indicated that it could be marine ivory despite that the medulla wasn't utalized, (Small edges of the Medulla could well be present under the backing silver depending on the size of a tusk used and where and how a tusk is cut). Your further images also indicated the possibility or Elephant ivory. When considering Elephant ivory the cross section should reveal the Lines of Retzius or engine tuning.

Gav,
It's really difficult to show, but I think I can see signs of the 'engine turning' on the end, LOL great description!