If I were inletting a stone point into a knife scale, I'd clamp it in place and scribe around it with a very sharp, small scriber (or a needle). Then just remove the background inside your scribed line with a dremel tool or by scraping. The center of that burr should cut/scrape pretty easily - it's generally much softer than the outer layers. Once I had the point set down into the burr far enough, I'd use any good clear epoxy rather than super glue to hold it in.
Sorry. I didn't notice you already had the inletting done. I'd prefer the eqpoxy over super glue because of the additional support it would give the edges.