I've had one pair of Altamont grips on a revolver, these on a Model 19. I didn't like them as they are acrylic impregnated, or stabilized, as some call them. I don't like the feel of them, and they are similar to the factory Ruger grips, and may supply them.
While mine were "rosewood" they were actually birch stained rosewood. And they were laminated. My own preference is to pay more and get real hardwood, oil finished grips. At the time, Altamont refused to make me any solid, oil finished grips.
Paid the money and went with Cary Chapman's grips for my guns.
Bob Wright