I believe this is correct, feel free to correct on actual yields, order is definitely correct afaik.
Moderate (2 of the General Resource)
Abundant (4 of the General Resource)
Bountiful (6+ of the General Resource and Chance for Rares)
Rich (6+ of the General Resource and Chance for Rares)
Prosperous (Many General, Several Rare) (Prototype Mission Discoveries Only)
Wealthy ( Huge of General, Many Rare) (Artifact Mission Discoveries Only)
This is from Underworld Trading where you have a General and a Rare silk, also the same for metals. Also occasionally you can get patterns. The Discoveries also come with Companion Gifts for this particular skill.
I had an Artifact mission yield 4 of each artifact class, 8 of each prototype class, a schematic, and a companion gift.
So once again, Moderate, Abundant, Bountiful, Rich
Then the missions give you Prosperous and Wealthy.