This is a Scottish knife called a sgian dubh and is typically worn in one's sock just below the hem of the kilt. The blade is damascus steel. The bolster is red deer (European elk). The handle is black horn with leather Spanish knots. The pommel is sterling silver with a green jasper stone from Scotland. The trefoil design is also sterling with steel pins. The sheath is dyed black leather with an attached flat-horn shield. My family Scottish crest has a boar, so that is what is engraved on the shield with a stipple design to highlight the engraved boar.
Copy and photos supplied by Carl Dumke.