Does silk affect the stone's overall durability at all? I have found myself really preferring silk in certain gems recently. It seems to give them such a glow.
To my knowledge, I don't think silk in stones hampers durability. Usually a feather along a corner, or a surface reaching crack like emeralds have, are inclusions that do hamper durability.
My understanding is that some silk is usually fine; it’s those that are overly opaque that may pose an issue as they may be masking huge feathers or cracks that are difficult to spot.