As far as I know, "the last white point star" isn't something that's featured in DW or its spinoffs. A white point star diamond did feature in "The End of Time" but that was never said or implied to be "the last". If the asker is under the impression that the white point star diamond in that story was the last one, that is a misunderstanding.
It's very far from clear what this question is about & it might be based on a misunderstanding. The asker should use this talk page to explain what it is that he/she wants to know. As it stands, the question can't be answered, because we can't work out what it's asking about. --18.104.22.168 22:21, April 22, 2016 (UTC)