Kesiera

A kesiera is a jeweled pendant on a chain worn in the hair with the pendant on the forehead. It is commonly worn by Cairhienin women of high rank.

References

NS,Ch12 – After being raised to the shawl, Moiraine is allowed to wear her kesiera for the first time in six years.
NS,Ch17 - Moiraine wears her kesiera as she travels through Kandor.
TEotW,Ch53 - The first use of the One Power Moiraine learned when she was a girl in the Royal Palace of Cairhien was to use her kesiera to focus her ability to eavesdrop.
TSR,Ch36 - Moiraine, Egwene and the Wise Ones eavesdrop on Rand and Rhuarc using her kesiera.