Pearl Powder as a Skin Lightener?

I want to try Chinese pearl powder for it's skin benefits but after doing some research I've learned it can also lighten your skin. I am African American and do not want discoloration as a result of using the powder. Can anyone tell me to what degree the skin lightening properties of pearl powder work for people with non-white skin? Anyone have any experience using it? Did it just clear up your dark circles or did you notice an entire lgihtening affect?