Minecraft Mythbusters: Does making my pyramid out of better stuff make the beacon better?
If you’re going for looks only, yes. Yes it makes it look better.
If you’re just worried about the effect, then no. No it doesn’t. You can make your pyramid out of iron and get the same effect as if it was made out of emerald.
Bottom Line: It’s the size of the pyramid that affects the range, not the material.