Guild Wars 2

I found a rare Wildfire Talisman in CoF explo, path 2, from the jailer boss.
http://wiki.guildwars2.com/wiki/Wildfire_Talisman

I salvaged it with a master salvage kit and received an Embellished Brilliant Chrysocola Jewel Kit.
http://wiki.guildwars2.com/wiki/Embellished_Brilliant_Chrysocola_Jewel

I’m a jewelcrafter, so I tried crafting something out of it. I should be able to combine it with a mithril setting and one mithril chain/band/hook. If I do so in the discovery tab, I can combine it with those items and it says that it looks like something, but I can’t click the craft button (see screenshot).

Found the problem. I need 3 of the jewels.
The numbers displayed in the discovery tab are pretty hard to see against that furnace background… -.-