That necklace she had--was that taken from Classic Who or is it a retcon?
It seems to be new. She says in Journey's End that a 'Verron soothsayer' gave it to her - and this is also apparently how she got the puzzle box which features in the Sarah Jane Adventures story, Whatever Happened to Sarah Jane? (http://en.wikipedia.org/wiki/Whatever_Happened_to_Sarah_Jane%3F). But I don't know when or where she is supposed to have met this soothsayer, and I'm certain it isn't in Classic Who. I presume it is meant to be a reference to an unscreened encounter, either while travelling with the Doctor, or since then as a result of her investigations on Earth.
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It seems to be new. She says in Journey's End that a 'Verron soothsayer' gave it to her - and this is also apparently how she got the puzzle box which features in the Sarah Jane Adventures story, Whatever Happened to Sarah Jane? (http://en.wikipedia.org/wiki/Whatever_Happened_to_Sarah_Jane%3F). But I don't know when or where she is supposed to have met this soothsayer, and I'm certain it isn't in Classic Who. I presume it is meant to be a reference to an unscreened encounter, either while travelling with the Doctor, or since then as a result of her investigations on Earth.