Links show up as the quality of the item. Glyphs are common quality items, so the Wowhead links are white.

[item=1396]Acolyte's Pants[/item] <~ Poor
[item=14115]Aboriginal Bands[/item] <~ Common
[item=4768]Adept's Gloves[/item] <~Uncommon
[item=9454]Acidic Walkers[/item] <~ Rare
[item=13314]Alanna's Embrace[/item] <~Epic
[item=22736]Andonisus, Reaper of Souls[/item] <~ Legendary
[item=12947]Alex's Ring of Audacity[/item] <~ Artifact
[item=44102]Aged Pauldrons of The Five Thunders[/item] <~ Heirloom