Highly pigmented and finely ground watercolors made by hand in the USA. Extra fine watercolors produce clean washes even layers and also possess superior lightfastness properties. PrimaTek® Green Apatite Watercolor lets you create a beautiful range of greens-fresh yellow-green to deep olive-with a single tube. This sedimentary color is a dark almost brown olive green in mass tone. In washes the brown settles out of a vivid natural green.