We are just about to choose granite interior cornices and are unsure about the choice, what looks best in the long run and is also easy to maintain (keyword dust!).
Would be happy if you could report, for which granite window sill you have decided for indoors. Experiences, model names and gladly also pictures of your windows are gladly seen. I realize that this is completely individual. We just want to find out what you have decided to do, so to speak as an inspiration. So, show us your windows (texts) :)
We have taken to anthracite wood windows Granite from Hauzenberg, polished and with minimal fibers.
We have Nero Assoluto brushing our anthracite windows outside.
Inside we have Verde Maritaca with antique white windows ;)
Just because you don't see the dust doesn't mean the dust isn't there. In that respect you will find the same dust in the same amount on all windowsills.
If I were you, I would pick the shade and finish that you like. If glossy black is an idea for you, then polished Nero Assoluto.
We have flamed and if I have it right in my head brushed material as flooring in kitchen and WoZi. Has slight bumps, you can walk barefoot super on it. Completely smooth I find it terribly boring and always looks so'n bit after the sales hall.
Have now opted for Bianco Neve and feel very comfortable with it :)