You can easily sell it on here around spot price but you would need to get an accurate weight in grams.
It looks like a nice chain, and you might get at least spot price for the gold on the forum,
but I've noticed that bitcointalk is not the best place to sell anything, not even precious metals.
If you've got to have bitcoin for it, selling it here makes sense, but if you're looking to get the most for it, try selling it where you get the most eyeballs--eBay is the first place that comes to mind.
I don't think you'll get the best price here.