AmeThanks!
Mine is custom based on their signature stock setting. It's custom because I wanted the head made "taller" because i like to see the culet (bottom point facet) of my stone from the side. I wanted it to sit at a very specific point in the head, so they made it to spec.
I love your new necklace. It is beautiful and goes perfectly with your other pieces. You have exquisite taste. Wear them all in great health and happiness.