Abstract art uses a visual language of form, color and line to create a composition which exists independently of visual references to the world.  

Black, white and greys achieved by mixing black and white. Artwork that is executed without color. All other colors employ chromatic pigments.

Acrylic is a water-based paint. It dries quicker than oil based paints allowing artists less room for error. Some artists prefer acrylic over oil and one of the most important reasons is its conservation. Acrylic will not fade or change colors. Acrylic is notable for its resistance to chemical change, making it valuable for its art conservation.

An appraisal is a formal document between an appraiser and the owner of an artwork to determine its value. It is commonly used for insurance purposes.

All color theory is based on the principle that 'color is light'. Color is produced by light of various wavelengths, and when light strikes an object and reflects back to the eyes. An object that we see as red contains pigmentation which absorbs all of the colored rays of white light except the red color, which it reflects. White pigment absorbs none of the colored rays, and black absorbs all of the colors of the spectrum.

Concrete art and design or concretism is an abstractionist movement that evolved in the 1930s out of the work of De Stijl and "Bauhaus", the futurists and Kandinsky around the Swiss painter Max Bill. The concept "concrete art", or in French, "art concret", was brought into language about art consciously in 1924 by Theo van Doesburg as the opposite of "abstract art" in his "Manifesto of Concrete Art" (1930). In his understanding, this form of abstractionism must be free of any symbolical association with reality, arguing that lines and colors are concrete by themselves.

"The goal of concrete art is to develop objects for mental use, the same way people make objects for material use. "Concrete art" does not mean figurative art. The term "concrete" is an art that is not abstract in the sense that that it does not abstract or distort natural models. Concrete art means much more an art that is based on lines, surfaces and colors and in many ways follows a clear geometric principle. Max Bill wrote in 1947: Concrete art, as a last consequence, the pure expression of harmonious measure and law." In addition to the group, van Doesburg published the journal Art concret in 1930. Concrete art had an important influence on Colour Field Painting and on Op Art.

Max Bill further promoted this idea, organizing the first international exhibition in 1944. The movement came to fruition in Northern Italy and France in the 1940s and 1950's through the work of the groups Movimento d'arte concreta (MAC) and Espace.

Cubism was one of the most influential visual art styles of the early twentieth century. It was created by Pablo Picasso (Spanish, 1881–1973) and Georges Braque (French, 1882–1963) in Paris between 1907 and 1914. The French art critic Louis Vauxcelles coined the term Cubism after seeing the landscapes Braque had painted in 1908 at L'Estaque in emulation of Cézanne. Vauxcelles called the geometric forms in the highly abstracted works "cubes." Other influences on early Cubism have been linked to Primitivism and non-Western sources. The stylization and distortion of Picasso's ground-breaking Les Demoiselles d'Avignon (Museum of Modern Art, New York), painted in 1907, came from African art. Picasso had first seen African art when, in May or June 1907, he visited the ethnographic museum in the Palais du Trocadéro in Paris.

Source: The Metropolitan Museum of Art

Cubist Artists:

Carlos Mérida (Guatemalan, 1891 - 1984)
Diego Rivera (Mexican, 1886 - 1957)
Juan Gris (Spanish, 1887 - 1927)
Pablo Picasso (Spanish, 1881–1973)

An art movement dominant in Germany from 1905-1925. Expressionism is the tendency of an artist to distort reality for an emotional effect; it is a subjective art form. Expressionism is exhibited in many art forms, including painting, literature, theatre, film, architecture and music.

Impressionism, French Impressionnisme, a major movement, first in painting and later in music, that developed in France during the late 19th and early 20th centuries. A school of late 19th century French painters who pictured appearances by strokes of unmixed colors to give the impression of reflected light. Impressionist painting comprises the work produced between about 1867 and 1886 by a group of artists who shared a set of related approaches and techniques. The name of the movement is derived from the title of a Claude Monet work: “Impression, Sunrise” (Impression, soleil levant).

Mixed Media art covers a very extensive area. Any two or more mediums combined in a single artwork may be classified as Mixed Media.

*Oil and fabric 
* Acrylic and watercolor or pastels
*Paper and wood
* Fabric, yarn, and different items
* Clay and rope
* And hundreds more

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The term “old master” refers to painters of a certain skill level who worked before 1800.

The pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continents, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during the Early Modern period.

While the phrase "pre-Columbian era" literally refers only to the time preceding Christopher Columbus's voyages of 1492, in practice the phrase usually is used to denote the entire history of American indigenous cultures until those cultures were conquered or significantly influenced by Europeans, even if this happened decades or even centuries after Columbus's initial landing. For this reason the alternative terms of Pre-Colonial Americas or Prehistoric Americas are also in use.

Source: Wikipedia

The primary market means the first time an art object is being sold by a gallery or by the artist.

Where something originates; beginning; root; source. "The provenance of an artwork".

A reserve is an agreement between the seller and the auction house that the artwork will not be sold below a certain price. If the price is not met, the artwork goes unsold.

The secondary market means that an artwork has been sold before and it is now being resold. It is reentering the market.

A 20th-century avant-garde movement in art and literature that sought to release the creative potential of the unconscious mind, using sometimes the irrational juxtaposition of images. Surrealism originated in the nihilistic ideas of the Dadaist and French literary figures, especially those of its founder, French writer André Breton (1896-1966). At first a Dadaist, he wrote three manifestos about Surrealism — in 1924, 1930, and 1934, and opened a studio for "surrealist research."