Just two of the myriad of inconsistent ways this game handles ostensibly similar items/actions:
1) I can USE a CRYSTAL in my MH to craft something but I can't USE a CLUSTER to break it into crystals.
2) I can SEND a bonus ring from a daily login vendor to another character on the same account but I can't send a bonus ring from the sparks vendor.
In the case of (1) there's absolutely no logical reason for this, it's entirely just an annoyance, in the case of (2) it's simply ridiculous that something obtained trivially CAN be sent while another which is gained by actually playing the game isn't! Moreover, there's NO WAY to know that you can't do it until you've bought the Sparks ring and then find you can't!
SE, if you're going to block the sending of R/E items across an account the PLEASE make it clear in the tooltip! It's no good having a hidden flag that controls this as there's is no reason whatsoever to think that one R/E is different from another R/E in this regard.
Yes, I KNOW there's a web page, somewhere, where the hundreds of R/E items are listed than you can (or can't?) send/vendor/etc. but that's utterly useless when playing the game!