Hawkspar

Stolen away from their families, they are slaves, women with no names and no futures. Every moment of their days controlled by the avatars of the stone Eyes--Obsidian, Emerald, Raxinan, Ruby, Windcrystal, Sapphire, Sunspar, Tigereye...
And the most powerful of them all, Hawkspar, the eyes of time. Kings and despots come to her to know their futures, and she wades in the river of time, pulls apart its sticky threads, to arrange the world to her satisfaction. But she too was once a slave, plucked from her home, chosen by the Eyes to live in service to them, as much a slave now as she ever was. And with her sight into past and future, she can see the secrets of the Eyes--and the evil of the Eyes. Before the death of Hawkspar, another must be chosen by the Eyes--but the avatar has her own plans, and chooses a slave for her courage and rebelliousness, rather than her dedication to the goals of the Eyes. This slave is put to trial, but time after time, she is protected by forces unseen. Once she has swallowed the bitter liquid and has her eyes pulled from her head and replaced with the Eyes of Hawkspar stone, she can slip into the streams of time... and use time to her own ends -- to free the slaves once and for all, and destroy the Eyes, even if it means destroying herself in the process.