Thank you for the comments. I love the nugget. It looks really cool the way the water has worked it.
I have looked with my loupe and USB Microscope and there is no other material behind the diamonds. Just the gold they are set in. Here is a pic of the back of the crucifix as well.

I have looked with my loupe and USB Microscope and there is no other material behind the diamonds. Just the gold they are set in. Here is a pic of the back of the crucifix as well.
























