I think I agree with Bert on this one. In my experience the nut and saddle materials are far more important in overall tonal quality that the pin material. There are very many fine sounding guitars (cf. Willie-O's and my Flambeau/Lowdens) that have pinless bridges!

In my repair box I have many dozens of sets of bridges pins in many different materials: bone, ebony, rosewood, plastic, with and without inlays. I have never however felt the urge to splash out the equivalent of 120 dollars on a set of fossilized ivory pins however beautiful they may be! Unless the customer has a specific requirement I usually install what 1) provides a snug but not tight fit and 2) what seems aesthetically most pleasing in relation to the overall characteristics of the guitar. I usually avoid using cheapo plastic pins in repairs although some fearfully expensive guitars seem to come supplied with them as original equipment which seems excessively mean on the part of the manufacturers/luthiers in my humble opinion!

Best regards,

mooman