Guild Wars 2

I’m a level 425 Artificer and I can’t craft the: Carrion Pearl Quarterstaff

http://wiki.guildwars2.com/wiki/Pearl_Quarterstaff

1 X Carrion Orichalcum Imbued Inscription
1 X Ancient Staff Head
1 X Ancient Staff Shaft

‘Craft’ remains grayed out. I can however craft the Pearl Rod and the Pearl Conch using the Carrion Inscription.

Is this a bug or am I doing something wrong?

Are you sure you’re not in the Discovery screen?

Duh… I don’t remember discovering it.
Must be bed time …quietly backs away from keyboard in shame…