Center of me diamond necklace

Brand new never worn half carat center of me pendant on a white gold chain from Kay Jeweler's. It was mailed to me as a "gift" from my ex, he used to be abusive who for a long time made sure I was financially dependent on him and would use things like this to make up for his actions. He figured out where I moved to and mailed me this so I unfortunately don't have a certificate for the necklace. I am just trying to sell it as not to have it as a reminder in my house. It truly is a beautiful necklace though and would make a great gift for someone else. price is not firm and I'm definitely willing to negotiate, so if you like the necklace but not the price submit a bid and I'll go from there.