There are thousands of black women who are members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church). One of the most well known is Gladys Knight. See the "Related Links" below to learn more about some black LDS women.
White women as a whole are not jealous of black women as a whole nor is it vice versa. While there may be a few women jealous of another regardless of race, that does not mean it is all women of any...
They are not, at least not a large amount of them. Being jealous is something that almost all women are going to experience of other women, regardless of race.