Spherical mid century ceramic vase puristic design fat lava glaze mix 60s 7

Vintage ceramic vase from the 1960s to 70s. Puristic design and a beautiful combination of two glazes: on the upper half a fine drip glaze in muted green, gray and brown tones, on the lower half a rough fat lava glaze in anthracite. Unfortunately there is no mark visible on the ground. Very good condition, no damages. Dimensions in cm: Height 20 cm, diameter 21 cm. Weight 2300 gms.