Many of her jewels were passed onto her daughters. Until fairly recently, her ruby parure was in the hands of the Hohenlohe-Langenberg family (the descendants of Sandra) but I think at least part of it was recently sold.
http://www.royal-magazin.de/german/hohenlohe/hohenlohe.htmMissy received some of her pearls, I believe.
She held onto her wedding dress and her granddaughter Kyra wore it at her wedding to Prince Louis Ferdinand of Prussia.
Her situation might have improved had she lived longer--until the aftermath of WW2, Duke Charles Edward lived pretty comfortably after reaching an agreement with the German government, as did most of the deposed royalty.
It seems the loss of so much around her, especially so many relatives but also the financial and material side, was finally too much for her. Missy writes very movingly of how she found her mother so changed, physically and emotionally, when she was able to see her again, not too long before she died. Marie must've felt very adrift--she'd never really considered herself part of the British royals (though her children did), and her adopted country (Germany) was an entirely changed place and her native country (Russia) was completely lost to her.
