labelo, you're right on. It's a sad reality but to salvage 50% is pretty good. There are instances when it'll even be less.
With this particular rough however I was in email with our cutter and they are going to saw off a topper which will likely result in a 1ct+ size then the rest they will polish to be the main diamond. I told my cutter *I WANT PICTURES* of the process so I will post them here as I get em.