Fit a mesh into another

Hello everyone! This is my first time in the forum and I hope someone can awnser me.
I’m working with 2 meshes, they represent a scan of two stone molds made with Roland Modela MDX-20 scanner.
I’m searching for a software to fit one mold in the other yielding just one mesh, thus obtaining the real shape of the stone. Can I do this whith Rhino? Is there a way to do this quicky?

Thanks a lot for your time!

Hello Patricia,

if you can post the geometry i can try to align it with our scanner software. You may send it via private mail too.

Alternatively, you could try to align both meshes using Meshlab which is a free download. Here is a tutorial how to use the align tool.