Your interpretation need only resonate with you. Don't dismiss what you get out of hand, keep your interpretation as this is a possible meaning that's how I understand it. Perhaps seeing it again, then that would be a confirmation that you on the right track.
I don't see the symbol as definitive. It's a symbol in regard to the desire, a guide for direction. Sometimes you don't need to understand it at all as in a message that, hey you're heading in the right direction. It wasn't a locked door, a well or deep hole.
To me anything white bright with rays, to me is a positive, I see it as, hey, there is a light, there is some sort of guidance, and with precious or semi-precious stone, I'm noting I'm getting something of value (to me). I would just relax into the feel of it and not worry so much about getting it right.
I'm not inclined to choose a symbol consciously. I'll make an effort to interpret it. And know too sometimes it's not what the symbol is but the fact that I got one that relates to what I'm working on that I can use as a sign to let me know whether I'm moving toward with ease, or working against the flow and making it difficult for myself.
Alex