I just got my first Lithops (Stone Face) cactus this summer and to my surprise it blossomed! I didn't know it would do that, and I am happy I saw it when it did, because I hear cactus blossoms may last only a day. I guess he likes it here! I also have a Pleiospilos nelii(split rock), but it hasn't bloomed. These little jems are a wonderful addition to my plant family!