Copper Carbonate Hydroxide, otherwise known as Genuine Malachite. Malachite varies in color according to the natural source but also according to how finely that source has been ground, so there is a great deal of variety. Sometimes it is sold in grades depending on the fineness of the grind (for example, fine, medium and coarse).
Is a historical pigment which can be a little bit difficult to find as an oil paint. Natural pigments at one time sold malachite in oils. It is fairly straightforward to mix an approximation in masstone. The degree of grinding matters with malachite as finer grinds will become lighter and less chromatic. Listed as toxicity B, meaning it does have toxicity.
