It seems to be pretty durable, but I have no long term actual use that I can tell you about. It's much like the mammoth tooth - I have questions about it surviving recoil if it comprises the whole grip, but putting it over and in wood makes it stable and there should be no problems with full use.
Believe it or not, this set is made from maple. Mineral stained maple that is. Something that occurs naturally in certain locations. The tree leeches up minerals from the ground in the course of growing that can turn the wood or portions of it, different colors. This really looks alot likek Cherry, but it's not. Cool stuff from nature.
Here's a nice set done in Pheasantwood from Hawaii. Aptly named if you could see it in person - the grain is sharp and closely resembles pheasant feathers. It also comes into sharp focus and then back out as you rotate it under light. A very cool look!