I love genuine Stag Deer grips. They are very easy to work like 'ken s' posted, similar to Ivory and MOPearl, and do polish up great. Lucky enough to find these old Sambars recently at a gunshow for $75 because they were badly in need of refurbishing.
These on my Colt and those on my Vaqueros below are "first cuts" from right above the crown and have lots'a "popcorn". Really hard to find first cuts these days:
Pointers or Ajax European Stag (probably from New Zealand where European Stag deer have been transplanted for many years) notice how white they are even though old:
Melvyn Tyler Tru Fit India Sambar Stag:
1960's Pointer Sambar Stag:
They do make great pet chews. My Beagle was very interested and really sniffed my grips while shooting the above photos! Don't leave your guns w/stag out if you have a pooch!