If you don’t have any science in your background and you decided to wing it, “Ir” would appear to be the right symbol for “iron ore”.
That’s what a copywriter did when designing a box of Oat Start. Reddit user homegrownunknown found the typo and uploaded it to the social sharing site.
In the forum user mer-mer-mer-mer-mer notes that iridium, a transition metal of the platinum family, is not something you would want to ingest:
“Chemist here! The real worst part of this is that Iridium is the 2nd densest element and most corrosion resistant metal, even at temperatures as high as 3600 °F. Good luck passing that lump.”
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Source: Mining.com- Platinum News