The variegated shape of this plant presents the typical yellow zones in the exact points where the chlorophyll is absent; such zones will never be identical from one plant to another, thus making each exemplar absolutely unique and, for this reason, very sought after by collectors. The Gymnocalycium bicolor is a cactus which, as it can be understood from the name itself, has two distinct colors: the lower part and closer to the root is of a yellowish color with brown shades, whilst going up towards the apex it becomes more and more green. Its stem is formed by fairly deep ribs where there are numerous well defined tubercles. From these come out long whitish thorns that, going up towards the upper part, may change slightly of color becoming more greyish and brown. From this Gymnocalycium can be born magnificent flowers on the white with shades of other colors.