Nerubian have only two rare vanity items. Dig sites can be found in Northrend and Eastern Kingdoms.

The Puzzle Box of Yogg-Saron item will send different whispers when you try to open it.

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Below are WoW Dig Site Articles, separate pages dedicated to each listed Artifact.
Artifact	Notes	Skill
Blessing of the Old God		375+
Puzzle Box of Yogg-Saron	Whispers to player	375+

Below are Nerubian Common items with Wowhead links.

Common Artifact Links:
Infested Ruby Ring
Scepter of Nerzar’Azret
Vizier’s Scrawled Streamer
Spidery Sundial
Six Clawed Cornice
Gruesome Heart Box
Ewer of Jormungar Blood