you need more detail..ie metal type, is it plated or sterling or white gold? is the onyx lab created or authentic...i would bid very largely if we knew these details!
In order to have better results with your auction, please add more details regarding your item. Also, any other specific details particular to your item will go a long way in instilling confidence in potential bidders. This will also reduce the number of questions that your bidders will have to ask.
Thanks for your cooperation and I hope you get a ton of credits!