I’m happy with the design aspects for now. Time to think about Toolpaths and order of operations. (I mean, this should always be at least in the back of mind…but it’s time to bring it to the front of mind)
First off, the gem is a solid body model which was combined/cut from the solid token. This leaves a bunch of facets and such that will probably get annoying when it comes to generating the Toolpaths:
A super easy way to deal with this would be to revolve the solid body of the gem, cutting away a cone that very nearly matches the outer bounds of the gem. Toolpaths like nice smooth sides/cones much more than facetted cones…unfortunately fusion has only added solid sweeps (which is awesome for dragging a tool through a solid to see how it turns out!) but they haven’t added solid body revolves as far as I can tell.
That said, they do allow a similar enough option via sketches using the “spun profile” projection:
This allows you select a body and spin it about an axis, projecting the bounds of the solid. This creates a profile we can then revolve to cut away from the token. Exactly what we’re looking to for!
Now that’s a much better looking surface and the difference of a few fractions of a mm won’t matter all that much. We’re doing an pseudo-functional aesthetic part here, not rocket science or whatever @RichCournoyer does (oh, actually that is rocket science 
)
There is still the slightest bit of faceting around the top of the gem seat. Let’s hop back into the sketch and add a bit of a cheat profile we can add to the revolve to clear all of the material:
Much better:
That’s plenty of words for this section, I’ve got to give a think about how I should actually process these tokens. One at a time? Probably not. Twenty at a time? Also unlikely…
Anywhose, last night I spent waaaay too long reading through the various threads by @Vince.Fab Hardcore Aluminum milling on an S3
and
Visual Chronicles of a Nomadman
So I think the rapid fire style of those threads has some influence on this one. He always seemed to have results by the end of it. Let’s see if I can do the same 