Orichalcum Chemistry

Orichalcum Chemistry or alchemistry refers to the logical problem of how fantastical substances can exist atomically speaking or, more generally, is the study of all fantasical substances and their (macro)properties.
https://en.wikipedia.org/wiki/List_of_fictional_elements,_materials,_isotopes_and_atomic_particles
What would mithril look like if put under a microscope? What would a chemist or material scientist see? It would have to either look no different from another particular metal or it would be something completely unknown and confounding—but there would have to be something there.
==Possible Solutions==
*Alternate quantum or string state, "mirror" molecule (say mithril to titanium) that has very different properties
*Substances built out of atoms of non-nuclear/atypical magical particles (magical subatomic counterparts or known unstable subatomic particles)
*Magically stabilized isotope of known metal
*Magically stabilized currently known synthetic element (see)
*Higher synthetic element above 118 that is actually stable (table would be circular in stability, see and this alternate table)
*Other hand-waving-ish unforseen dimension of the periodic table (thus actually a 3D relationship)
Category:Meta