Abstract Oil Paintings For Sale. Oil painting produced before the Renaissance, or after the Renaissance by artists of modest means, will not contain the fabulous but astronomically expensive natural blue pigment Ultramarine, made from ground up mineral Lapis Lazuli. A painting can be wholly abstract (meaning, it has no resemblance to any natural shapes: a form known as non-objective art), or organically abstract (some resemblance to natural organic forms), or semi-abstract (figures and other objects are discernible to an extent), or representational (its figurative and other content is instantly recognizable).