It looks like it could be Edwardian, but hard to tell, it would help to show a photo of the clasp as well. The photo is a little glare-y, hard to really see the stone that well, sure could be rose quartz, or maybe could be angelskin coral? I'm not great at ID'ing minerals, but there's lots of resources on the web to help you identify different stones, here's one that I like: http://www.bernardine.com/jewelry-color.htm cuz it is really hard to tell from photos unless they are super awesome photos (which are super hard to take, at least for me!)
