Over the years, I've been intrigued by the stone Pietersite. Most of the beads I've seen have been brown and black with lots of golden swirls. This particular strand of briolettes I purchased this year in Tucson had no golden color at all. As a matter of fact, they had an unusual wood-grain look to them, even though they are perfectly smooth. They do have the chatoyance that is typical of Pietersite.
Needless to say, I love these earrings and will most likely make a pair for myself before all the beads are gone.