:- What, you can do that? Out of what?: Come to think of it, Vanyel doesn't have the slightest idea what diamonds are made of, when he asks himself the question he just gets 'they're made of diamond, obviously' but if he's making one it must be starting from something else– oh, of course, Leareth would know.

"Leareth, Blai says that in the next week you're going to invent a technique to - make - a diamond? How would that work, what are diamonds made from -?" 

Leareth's mind is not moving incredibly fast, but it's - not, actually, a complicated chain of thought. 

"...They are made of the same material as the soot left after very thorough burning of wood, just - differently arranged. Very differently. They form in the earth under vast pressure, but - oh - I think I understand broadly how - no one could do it but you, Vanyel, but you certainly have the power and you ought with practice and a good enough technique have the finesse..." 

Leareth is speaking slowly and tripping over his words a bit even so but he's happy and Vanyel hadn't begun to realize how desperate he was to see that.

He relays that to Blai in Mindspeech. :Leareth agrees it's possible, and it makes sense that I could do it - can I look, were there any details you caught of the working -?: he reaches to just try to catch what's still there in Blai's surface thoughts. 

THEY ARE GOING TO HAVE INFINITE DIAMONDS FOREVER!!!!!

(Okay, not 'infinite', that looked exhausting for Vanyel in the vision and apparently it's all going to be on him, but - even if it's exhausting, with the right support he ought to be able to cast a strenuous spell a dozen times a day - and even if he needed a Restoration after a dozen to keep going, that would be worth it, right, to get a second dozen diamonds, and the one Blai saw looked pretty enormous, you could probably shave enough off it for a few Restorations and still leave it big enough for the most powerful diamond-requiring spells...) 


...The Abadarans are going to lose their minds when they learn about this, aren't they, it's going to be so adorable. INFINITE!!! DIAMONDS!!!! Seldan is almost bursting with the smugness of it, even if technically his Herald (the BEST Herald) did not personally invent or cast the spell and is just responsible for them learning that it's going to work up to a week earlier than they would have otherwise... 

Blai will happily recite what he recalls about the placement of the quartzes and wire and bowl and magic.