if he got it, don't sell it, if he doesn't and keep it in the cargo he got a higher chance to get better minerals, like the time i gotten kurenite.

It is impossible to get until rank 160. If you started playing the game after the introduction of aidonium, it will be visible on you minerals tab, but you won't receive it. If you started playing before it was introduced, it won't be visible until you get it at rank 160 or someone send you one. Even if someone send you one, you still cant receive it until 160.

Untrue, I recieved one from a legion member and was able to sell it for the 17 mil price at lvl 60ish.

What? This isn't true and doesn't make sense. The only thing that determines what minerals you get is your rank. The higher your rank, the more likely you are to get a higher value mineral. Plain and simple.

You received that from a high rank legion member, not your own mineral shipment.

it's what happened to me, i kept the kurenite and keep getting stuff like pawlicte, when i solt the kurenite i no longer recieve thoose minerals.

Well, it's either Dan has never told anyone about this part of the equation ever(that doesnt make sense, in rl why would keeping one mineral sample get you more rare minerals?), or this is a coincidence, or this is a part of your leveling up if you ranked up fast. The search keeps blocking my search terms so I cant find the post but I remember clearly Dan saying that only rank affects minerals received(If someone knows where this post is please bring it here in a quote. If it is non-existant, please prove this post wrong).