Ceramics, vase with geometric shapes, vintage

This vase is a beautiful green with dark gray color and the vase has geometric shapes, they look like letters but they are not. Unfortunately not signed on the bottom, but it was made by an artist. You see different shades of green, small brown speckles and the separate shapes on the vase outlined in dark gray. The ceramic at the bottom of the edge is very slightly damaged, 3 small chips are missing on the bottom edge. Furthermore, the vintage vase is in good condition, see also the additional photos.