Jigged bone is bone that has been machine-cut with a repeating pattern of grooves and dimples before being dyed. The texture improves grip and gives traditional pocket knives their characteristic look.
The bone is held in a jig and cut with a repeating pattern, which is where the name comes from. Different jigging patterns have their own names in the collector world, and a maker will often use one pattern as a signature across a run.
After jigging, the bone is dyed. Dye settles more deeply in the cut recesses than on the raised surfaces, which is what produces the two-tone depth characteristic of a good jigged handle.
Functionally, the texture gives grip that smooth bone does not. Aesthetically, the crispness and consistency of the jigging is one of the things collectors judge a traditional knife on.
Care is the same as any bone handle: avoid soaking, avoid dishwashers, and oil occasionally.
The term is not academic here. 59 of the products currently on our shelves describe this feature in their own manufacturer specifications, across 3 of the nine brands we stock. Examples in stock right now include Case Team Duke Trapper, Case Folding Hunter Burnt Bonestag, Case Folding Hunter Dark Red Peach.
Everything below is pulled live from the catalog, so what you see is what is actually in the Woodlawn warehouse today.