I layer all kinds of dbty, even diff colors gold. One idea might be to put the locket on a wg dbty. I wear a 20" rg dbty w charms(mostly Helen ficalora, which for some reason don't scratch)and a 16"yg marquise dbty plain or with a p Picasso open heart from the '70's, and sometimes add a one stone dbty or 16" wg dbty. The thing is just have fun. I have so many dbty, because whenever I get tired of something or have lose diamonds I think the dbty are a great thing to have made. So classic and so much you can do with them. My husband gave me a marquise band for our 10th, and it was such a surprise and so sweet(and I was so young)that I wouldn't of dreamed of exchanging it(where did that sweet girl go??). Two years ago, and 15 years latter, I got the idea to make a dbty out of it, now I love it and where it everyday. As far as engraving, I look at jewelry as very personal items and you should do what best expresses you. But most of all, have fun.