I think there was a place here in town that was using a jeweler's type wire saw to cut pieces of clear ice off of a large hunk. They made the big hunk over an 18-20 hour process, then cleaved off pieces as needed for drinks. Should you pay more for that pretty labor extensive process?
We just went to a local distillery after work, they had both crystal clear "ball ice" for low-ball glasses and "cylinder ice" for high-ball glasses, which is neat.
Neat. Also how I drank my Rye, because I have hair on my chest and don't need shiny ice balls for my booze.