Vintage New Mexico Agate Half Sphere Geod from Native American Reservation shop

This was purchased around 2002, traveling through New mexico, on a Native American reservation. it is stunning and quite heavy. it fits in the palm of your hand, though. In natural light, it kind of has hues of purple, but overall, it's mostly a creamy gray and taupe. There is a natural chip on the edge, but it came like that. This has just been in various planters or storage boxes this whole time. just needs a light cleaning. facing upwards, it's about 3.5 inches across from one side to the from the back, it is 5.5". weight is 1 lb