I´ll broke it up a little bit.
Assuming you have 3% of Ir in your rocks. That is great. Now you need to sell it to the refinery. Otherwise you cannot liquidate it for money. They will demant analysis, or propose their own analysis for quite a fee
without proper fire assay, there will be no purchase anyway.
So if your belief is so hard that you were destined to have iridium, and it is a gift as you say... Do an assay of it. Go ahead. If there is iridium in any form, assay would reveal it. Or you are afraid that they will intentionally tell you that there is no Ir in the sample ? They want to make profit, there is no point for them in doing that. You cannot assay for Ir at home, you cannot melt it, you cannot analyze it. Even in induction furnance, it would be very tough...
That is the way you must undergo (if you are happy or not about it), if you want to proceed somewhere in this situation. Believing is good for you, refineries work on evidence. If you want to cross that border, you will need to go the traditional way
By the way, the jeweller you mentioned in the beginning of this mile long thread probably never seen iridium in his whole life
Practically speaking, if I place Fe, Ni, Co and whole 6 PGMs as foils in front of you, your chance of picking up Ir would be 1/9