Sparring armor question

[Tann]

Sparring Armor

lists Pile of Granite Pebbles as an ingredient, wiki doesn't really say anything about what drops them and lists them as a blacksmithing recipe that doesn't show up on the blacksmithing page. Also the quest verbiage says a few times that you need to "tailor" the husk and pebbles, is there a skill check and/or required tailoring skill?

Is the granite pebbles quest the only way to obtain these or is there a recipe that is just not listed?


Thanks

[Potus]

That is the only way to obtain those.