o.dem denotes a stone named first in lists of precious stones used in a setting or covering.

The attested use is a stone named within lists of precious stones: in Exodus it belongs to the first row of a stone setting, and in Ezekiel it is among the stones described as a covering.

1. Stone in lists of precious stones · dominant

   The singular absolute noun occurs in lists of stones. In Exodus 28:17 and Exodus 39:10, the APB renders the first row of a stone setting as including “sardius”; in Ezekiel 28:13, it renders the term among the precious stones described as a covering.

   Exodus 28:17Exodus 39:10Ezekiel 28:13

In the Anselm Project Bible: Across all three verses, the APB presents the term as “sardius” within lists of stones. This rendering is confirmed by the surrounding stone lists rather than by alignment alone.