'Nina con Collar', ( girl with necklace) is among the first 20 of her 143 paintings. Photograph:( Reuters )
Frida Kahlo's painting "Nina con Collar," (girl with necklace) will be auctioned next week at Sotheby's, New York.
The painting which has never been exhibited before was given to a women who helped Kahlo in the studio by her husband, muralist Diego Rivera after her death.
The estimated value of the 1929 oil on canvas is $1.5 million to $2 million and will go under the hammer on November 22.
Head of Latin American art at Sotheby's, Axel Stein said "The painting looks very fresh. It was in a dark part of the house so the colours are vibrant," despite hanging in a California home for 60 years.
"Nina con Collar" is among the first 20 of her 143 paintings, Stein said.
The girl in the painting is aged 13 or 14 and stares directly ahead. She wears a jade necklace that is also present in other paintings by Kahlo.
Her copper skin tone contrasts well with the dark background; a mix of indigo and light blue, adding depth to the painting.
(WION with inputs from Reuters)