A beautiful serpentine, Opalstone is a very hard, finely textured stone with an almost translucent surface sometimes specked with red, orange and bluish dots and patches. Opalstone is famous for its milky light coloured greens and smooth texture. It is also unique in that it has fewer colour variations than serpentine. Mined at Chiweshe, two hours north of Harare, Opalstone is one of the favourites of sculptors, as it’s not as hard as Springstone and other Serpentines, but still polishes...