Where can you post a picture of and find the value of a spanish cross you own?

I found a Spanish Cross in The Florida Keys in 1975. It has a scull and cross bones below the figure of Christ. It is 5 inches high x 2 and a half inches wide. Wood inlay on some kind of metal. not silver nor bronze. Has pointed tips,rather than flat. I would like to find it's appx value and more about it.