I Had It in My Hand

Rare artifacts in all of the archaeology tiers:

Fossil:
Fossilized Hatchling
Fossilized Raptor
Extinct Turtle Shell
Pterrordax Hatchling
Ancient Amber

Troll:
Zin'rokh, Destroyer of Worlds
Voodoo Figurine
Haunted War Drum

Dwarf:
Clockwork Gnome
The Innkeeper's Daughter
Chalice of the Mountain Kings
Staff of Sorcerer-Thane Thaurissan

Night Elf:
Highborne Soul Mirror
Druid and Priest Statue Set
Queen Azshara's Dressing Gown
Bones of Transformation
Tyrande's Favorite Doll
Kaldorei Wind Chimes
Wisp Amulet

Orc:
Headdress of the First Shaman

Draenei:
The Last Relic of Argus
Arrival of the Naaru

Nerubian:
Blessing of the Old God
Puzzle Box of Yogg-Saron

Vrykul:
Nifflevar Bearded Axe
Vrykyl Drinking Horn

Tol'vir:
Crawling Claw
Scepter of Azj'Aqir
Staff of Ammunae
Pendant of the Scarab Storm
Ring of the Boy Emperor
Scimitar of the Sirocco

Pandaren:
Spear of Xuen
Umbrella of Chi-Ji

Mogu:
Quilen Statuette
Anatomical Dummy

The icon and title of this achievement makes me giggle.

EDIT: The icon used to be a hot dog.

Yet another Archaeology reference to Indiana Jones. This was a line spoken by Indiana when he was conversing with Marcus about the Golden Idol in the Hovito temple at the beginning of Raiders of the Lost Ark, before it was stolen from him by his French rival Rene Belloq.

Expect more of this. (it's not a bad thing...)