Check out Patrick Adair Designs amazing custom hand-made rings!
   / @patrickadairdesigns  
https://patrickadairdesigns.com/

When it comes to 3D Printing and Photogrammetry, I would highly recommend Meshroom and Prusa. You only need a camera (your phone will do) to take high quality pictures and then Meshroom will create the model. You will have to clean up the file, and for that I use Microsoft 3D Builder.

This bison fossil was found in the United Kingdom outside of Norwich.

https://www.fosshub.com/Meshroom.html

https://www.prusa3d.com/