Diamond tweeters? Diamonds are stones... very hard stones...

The goal for a dynamic tweeter is to use a very stiff and very light tweeter that responds quickly without ANY
cone or dome distortion.

So HOW does coating a dome or whatever with bits of stone make that dome both VERY stiff AND very light? The adhesive would be the limiting factror, not the bits of stone.

Or are they machining diamonds into cones or domes?

I understand how Magnepan gains a dynamic response advantage by changing from 1 mil Mylar to 0.5 mil Mylar for their diaphragms.

So please be specific.