Diamond dome tweeters

Oh, I think Crystal Cable made speakers using the Seas diamond, and JA at Stereophile did an absolute crap job reviewing it.

That the tweeter is flat to 600 hz is impressive, but for what a $35,000 pair of 2 ways? The diamond dust deposit usher does is completely different than this seas excel. I'm starting to think the engineers at seas are running out of ideas.

This was the only Seas Diamond reference I found:

https://www.diyaudio.com/community/threads/seas-excel-t29d001-had-anyone-heard-it.293222/

I have used several Seas drivers.  They are very nice with different sonic signatures.  I build and then re-built a set of speakers for a project (2 towers and a center).  For the last rebuild, I considered using the Seas diamond, but at $6k per pair, they were just too expensive.  I ended up using the Seas Excel T29B001 Beryllium, which were excellent!

those are $6k each sold in pairs!!! tell me i'm wrong, please