I admire her for being that wealthy and not placing something like diamonds as something of high priority in her life... Heck, I'm not even worth 1% of what she has and I looove diamonds.
Although I, personally, would never be able to sell my mother's jewelry (when I inherit it). I would have to be on the brink of dying of starvation to reach that point, and clearly she doesn't need the money. I'll refrain from judging though, as like mentioned, she was only 3 when her mother died and her family history seems to be a bit sketchy in terms of relationships.