Thanks Mark for the additional photos. I personally cannot tell if this is amber or giraffe horn , but Elgood doesn't mention amber as a material in these daggers . He does quote this; " giraffe horn, which has a rich translucent amber colour and was imported from East Africa..." (pg 93 The Arms and Armour of Arabia). Unfortunately he does not have any colour photos of it.
Does anybody have any colour photos or references of either of these two materials (no pressure Jim

).
In any event your dagger is a keeper!!!
Jeff