star sapphire help?

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To the DC fans on my flist, I need your help. I was hoping you would help me out with info about Star Sapphire, Carol Ferris to be specific. I've done my research online but there are some stuff I don't understand, mainly how she became Star Sapphire. IDK if that info is even available but if it is, could you let me to know or maybe point me in the right direction?

Any info would be much appreciated.

Thanks in advance!