Beautiful Silver and 'Diamond' Pendant

This pendant is beautiful and very well made. It has the mark "LA" stamped on the back and is shown in a photo. Here’s what I found about that: “What does LA mean on jewelry? These stamps stand for sterling silver. This means the piece of jewelry should be 92.5% pure silver mixed with another metal, usually copper. Silver on its own is very soft and needs another metal added to make solid jewelry.” I am also assuming the large 'diamond' is a cubic zirconia, as well as the small ones that line the top part. I have some beautiful silver chains to wear it on, if you are interested. It's about 3/4" long.