Teir 4 & 5 common harvests:
Tier 4
Soft metal: Velium Cluster
Hard metal: Feyiron Cluster
Gemstone: Rough Opaline
Wood: Severed Briarwood
Woody root: Tussah Root
X-Qual pelt: Sullied High Quality {Animal} Pelt
Tier 5
Soft metal: Diamondine Cluster
Hard Metal: Fulginate Cluster
Gemstone: Rough Bloodstone
Wood: Severed Teak
Woody Root: Ashen Root
X-Qual pelt: Sullied Superb Quality {Animal} Pelt
Of course, you realize there dozens of alchemical/provisioner harvests not listed here, but hey, who cares about those silly alchemists, right? (I've got a level 41 Alchemist alt, I'm allowed to say things like that
)