I came across an article about a scientist creating snowflakes or snow crystals and it resonated with me what he said about why they are said to be each unique, appear to be symmetrical and how they are created. Such a beautiful thing created out of the simplest of beginnings.
The science of snow crystals explained here. The beautiful images are amazing. I pulled a quick search on Etsy for snowflake pendants.

The metaphor for me is in the details, the science of creation. We can change anything we want to change by the tiniest of movements in another direction, through another door, room, path and come out on the other side with an entirely different creation.
The full site is Snowcrystals.com if you want to explore these amazing creations and their complexities.