The pattern in some flat pieces of g10 I've seen on knife handles almost looks saw-cut...like they started with a thick piece, sawed it into thin pieces, and the texture is from the teeth. It may be that the texture is on the material when the knife manufacturers receive it, and they just don't choose to sand it off. Not in all cases, but perhaps in some. In terms of not dulling the holy hell out of your tools, micarta is SIGNIFICANTLY more machinable than g10. The latter seriously reduces the cutting life of my checkering files, not to mention doing horrific things to router bits.