When I first played through the beta, I was never able to loot the Ancient Pandaren Tea Pot due to the high level of phasing so when the achievement came out, I knew I would be one item shy from completing the Riches of Pandaria. Thankfully, this was no longer an issue after the addition of patch 5.1.

Here’s the series you’ll need to compete:

As usual, each artifact may only be looted once per character – although only 18 are needed for credit. You will come across a number of these objects as you level through the zones but if you’re unsure of the status at this stage of the expansion, the following macro can help you determine if a certain object has already been looted:

/run print(IsQuestFlaggedCompleted(XXXXX))

where ‘XXXXX’ refers to the flag quest number of each item you’re checking. If the result comes back as 1, it means you’ve already looted that object on that given character as opposed to a ‘nil’ result, meaning you’re still eligible to see and loot the item.

OBJECT LOOT FLAG # IMAGE
The Jade Forest
Ancient Pandaren Tea Pot

26.2, 32.4
 Ancient Pandaren Tea Pot 31400 FLAG Pandaren-Tea-Pot
Lucky Pandaren Coin

31.9, 27.8
 Lucky Pandaren Coin 31401 FLAG Lucky-Pandaren-coin-tn
Pandaren Ritual Stone

23.5, 35.0
 Pandaren Ritual Stone 31404 FLAG Pandaren-Ritual-Stone
Ship’s Locker (at this location) Gold 31396 FLAG Ships-Locker
Valley of the Four Winds
Virmen Treasure Cache

23.8, 28.5
 Gold 31405 FLAG Virmen Treasure Cache
Saurok Stone Tablet

68.6, 7.60
 Saurok Stone Tablet 31408 FLAG Saurok-Stone-Tablet
The Veiled Stair
The Hammer of Folly

75.1, 76.4
 The Hammer of Folly 31428 FLAG Hammer-of-Folly-tn
Kun-Lai Summit
Ancient Mogu Tablet

64.2, 45.2
 Ancient Mogu Tablet 31420 FLAG Ancient Mogu Tablet
Hozen Treasure Cache

49.5, 59.4
 Gold 31414 FLAG Hozen-Treasure-Cache-tn
Lost Adventurer’s Belongings

36.7, 79.8
 Gold 31418 FLAG Lost Adventurer's Belongings
Rikktik’s Tiny Chest

52.6, 51.5
 Rikktik’s Tick Remover 31419 FLAG Rikktik's-Tiny-Chest-tn
Statue of Xuen

72.0, 33.9
 Statue of Xuen 31416 FLAG Statue-of-Xuen
Stolen Sprite Treasure

59.5, 52.9
 Gold 31415 FLAG Stolen Sprite Chest
Terracotta Head

57.8, 76.3
 Terracotta Head 31422 FLAG Terracotta Head
Townlong Steppes
Abandoned Crate of Goods

62.8, 34.1
 Gold 31427 FLAG Abandoned-Crate-of-Goods-tn
Amber Encased Moth

65.8, 86.1
 Amber Encased Moth 31426 FLAG Amber Encased Moth
Fragment of Dread

Go inside Niuzao Catacombs (34.9, 63.1) and check several locations - 48.49 89.46 / 56.66 64.33 / 36.6,87.5 / 64.7, 21.3 (next to Huggalon the Heart Watcher)
 Fragment of Dread 31423 FLAG Fragment-of-Dread
Hardened Sap of Kri’vess

53,9, 58.4
 Hardened Sap of Kri’vess 31424 FLAG Hardened-Sap

The remaining list of objects do not seem to count towards any of the achievements but are still a great source of XP and gold. It’s no wonder these were one of my favourite ways to level myself to 90.

ZONE OBJECT LOOT FLAG # IMAGE
The Jade Forest Chest of Supplies

24.63 53.27
 Gold 31864 FLAG Chest of Supplies
Offering of Remembrance

46.3, 80.7
 Gold & Chastised 31865 FLAG Offering-of-Rememberance
Stash of Gems

62.4, 27.5
 Gems & Gold 31866 FLAG Stash-of-Gems
Valley of the Four Winds Boat-Building Instructions

92.0, 39.0
 Boat-Building Instructions 31869 FLAG Boat-Building-Instructions-tn
Cache of Pilfered Goods

43.5 37.4
 Rare Neckpiece 31406 FLAG Cache of Pilfered Goods
The Veiled Stair Forgotten Lockbox

54.6, 72.6
 Gold 31867 FLAG Forgotten Lockbox
Krasarang Wilds Stack of Papers

52.1, 73.4
 Stack of Papers 31863 FLAG Stack-of-Papers-tn
Kun-Lai Summit Mo-Mo’s Treasure Chest

44.0, 73.0
 Gold 31868 FLAG Mo-Mo Chest