Sigil of suppression
Like the Orb of Suppression, the Sigil of suppression, an artefact released in Merentesh's Shop of Wonders in Delos in the year 634AF, it can be attached to a single artefact in one's possession in order to hide it from one of the methods of third-person detection, including appraisal, unwearing/removal, and House inventory.
In addition, if the owner already owns an Orb of Suppression, the sigil performs the opposite function and reveals the artefact that it is attached to. It can be detached from the artefact at any time.
The Sigil of suppression is made of ivory and adorned with a single Aldar rune: an outline of a cloud.