There are two routes to go here:

Science route: kidney stones are largely made of calcium, oxalate, urate, cystine, xanthine, and phosphate in our world. Presuming dragon physiology is roughly the same as our world, there’s nothing inherently special about these elements in game. Short of “reliquary” type of usages (think finger bone of a saint), there’s no reason to think it is special. Considering dragon scale is used in armor, I have to assume any less exciting dragon “parts” would pale in comparison. Might have value as a trade good or interesting conversation piece to the right collector.

Fun route: this chunk of phosphorus can be used 1d8 times in place of normal phosphorus from your material components pouch, upping the damage die of any [fire] spell cast using it.

I can fathom no world where you’d want to trade away a multi billion dollar brand for a new brand you literally can’t SEO. What, you think your brand is gonna be more impressive that the generic variable, and a part of the alphabet?

“Follow me on Twitter” becomes “follow me on X”? “You should tweet that” becomes “you should X that”? The little blue bird on every shop window, website, and business card becomes a stylized letter that, hopefully, doesn’t look so threatening on the next iteration?

It’s a textbook case of brand destruction. I almost regret never making a Twitter in the first place, just so I could quit today, or at any of the hundred days in the past year where it got inexplicably worse without reason.