I found https://apps.dtic.mil/sti/citations/ADA278191 https://apps.dtic.mil/sti/citations/ADA278191 which has this to say about gold: >Hypothetical shape charg

I found https://apps.dtic.mil/sti/citations/ADA278191 https://apps.dtic.mil/sti/citations/ADA278191 which has this to say about gold: >Hypothetical shape charge liner. High density is a benefit but equally low speed of sound indicate s that it may be no better than uranium. An advantage may be found in its ductility, if it leads to greatly improved jet formation relative to its cost. It seems that sound speed and density are considered more valuable, so tungsten, zirconium, molybdenum.