> proceeds to make many gems with the bomb enchant, all have bomb keyword, he says "bomb" when throwing one, and realizing that they still explode even without intent, so all the gems in his pocket goes boom

im calling it now

Rin is probably the most prominent example people reading this would be familiar with, but there is plenty to go around. Here's the TV Tropes page on it (Rin is linked to from it at least twice since there were kind of multiple forms of media for her to show up in). I think the D&D ones are the best example on the page that I saw for similarity to Rin and this though, some are just literally flinging sharp gems at people to cause damage like arrows would.

https://tvtropes.org/pmwiki/pmwiki.php/Main/GemstoneAssault

LOL Yun's totally pulling a Tohsaka

The author is a fan of FSN. But then again, who wouldn't be?