trying to figure out what to use a resonating ineffable insignia in

https://wiki.guildwars2.com/wiki/Ineffable_Intricate_Silk_Insignia

i got access to the Resonating Ineffable Insignia on my mesmer when i got to level 400 tailor. the problem is I can't figure out what to use the thing in. when i go to the above wiki page it shows "Ineffable Intricate Silk Insignia" with nothing showing for resonating ineffable insignia.

any ideas of what to actually put this insignia in while crafting?