This item is forged or carved of a blue material, and a tiny star sapphire has been set into it.

While worn, an incarnum focus adds 1 to the essentia capacity of any soulmeld occupying or bound to the chakra it matches (up to a maximum capacity equal to your Constitution bonus). See Magic of Incarnum for information on essentia, soulmelds, and chakras.
Wearing an incarnum focus does not prevent you from binding a soulmeld to the corresponding chakra. This is a specific exception to the normal rule against binding a soulmeld to the same chakra as a worn magic item.
Ten different kinds of incarnum focus exist, one for each chakra (see the table) Chakra Bind (Any): While an incarnum focus is bound to its chakra, any soulmeld occupying or bound to the same chakra can’t be unshaped except by you, nor can any essentia invested in it be lost or drained, except as part of the normal reallocation process.
You can bind an incarnum focus to its matching chakra even if it is already occupied by a shaped or bound soulmeld. See Binding Items to Chakras (MoI 108) for more information.

Prerequisites: Craft Wondrous Item, Split Chakra (MoI 41), essentia pool.
Cost to Create: 7,500 gp, 600 XP, 15 days.