What Mineral is for a A-Rank Golem?

I'm making a HIdden Boss for Abel/Izanagi to fight solo. I'm having some difficulties of picking which mineral is perfect for an A-Rank Golem? So tell me mineral is perfect for the A-Rank Golem? Just to make it easy for you fans; I pick Platinum.

Comments

[Cursebringer]

Irl material or fantasy material allowed?

[GamePlayer64]

5655793
Sure. I mean its an AU Universe.

[Cursebringer]

5655794
I’d say:
magic crystal (allows for storage of magic in the crystals)
Mythril (chose the type you like I’d say a metal that has good magic conduction)
Living wood
Metal of own choice but with crystalized dragon heart (allowing for getting properties of dragon scales to the golem. Allows dragons the skill to harden scales for extra defense)
Flesh of the dead
Multilayered armor subsisting from harder and harder armor you get to the core
Non-physical (example a golem core surrounded by magic shields)

What do you think?

[orpheus talos]

as ranking goes in metals platinum is a strong metal and can hold magical enchantments easily, the problem then being having enough platinum to actually make the golem without leaving a somewhat obvious weak point when you ran out while making the darn thing.
top tier golems are often made of adamantine but you were asking for A tier so it’s either Platinum or Electrum, similar to platinum but easier to actually find

[rikusorasephiroth]

Beskar.

[Arveildir]

I say mythril, because I got a metal alloy that is basically god tier.