Also extremely difficult if not impossible to get a high polish on a groove.
Diamond hardness vairies by crystal orientation. Even if you could polish one side of a groove really well - the other side I imagine would be a nightmare.
@diagem ?
Not needed with the high RI of diamond.
Polish is very important for fire especially from all that I know.I love the fireworks look of those thin long facets/grooves though!
I still didn't get an answer to the question I was asking.
@Garry H (Cut Nut) @diagem how important is the polish to the light return performance?