[2022] Orikalkum ore / bars ???

Others have covered the general trope usage of orikalkum in genre fiction. It's a super metal, like "adamantium" and "mithril". While it's possible there was a real world metal that the ancient Cretans referred to as orikalkum, it's also entirely possible that Plato, or someone before him, simply made it up. It's not like bronze in the sense that it's simply a label we apply to a well-known alloy, it's simply myth that may or may not have a basis in fact.

Like any myth, when you filter it through into a modern genre setting you always take elements and keep elements. For example, in Tolkien, who invented mithril, there's a very strong association between mithril and dwarves, who are the ones who discovered and most valued it. In Runescape, by comparison, dwarves are more closely associated with adamantite. Meanwhile in Warhammer, the dwarven metal is "gromril" which is actually meteoric iron.

Think of it like vampyres. RS vampyres are a bit like classical vampires, but also deviate in some ways too. It's a lore interpretation error to read something like Dracula, identify differences between Dracula and Runescape, and then report them as if they were mistakes.

This lore actually does exist but it's scattered across various documents and never made it into game.

https://docs.google.com/document/d/12O0EEZvB__L0AEINZtuP7GGsrCwFMpeg8GCHfSaGL5E/edit?usp=sharing

I'd still like to but it's hard to prioritise really.

That's great to hear. There's a small lore entry for Necronium somewhere but I can't remember where to find it.