G-10 and Micarta are both really tough. The only exception to this is Paper Micarta. Paper Micarta was developed so that those working with it could get a smooth, high polished finish that was impossible to get with the cotton fabric that is used to make regular Micarta. Paper is not as tough a cotton so it makes for a more delicate material that finishes up real nice and will take scrimshanding.
Also, as a bit of trivia, Linen Micarta is not made with linen. It is actually made with a heavier grade of cotton.
Avatar knife is by Charles Vestal. Sheath by Paul Long.