Georgia O'Keeffe. Black Rock on Red, 1971. Oil on canvas, 30 1/16 x 26 1/8 inches. Georgia O'Keeffe Museum (Santa Fe), Gift of The Burnett Foundation and The Georgia O'Keeffe Foundation. © Georgia O'Keeffe Museum. [1997.5.4]
Painting of black shiny rock seated on a stump against a red background. Tonal variations in the rock give it volume and a smooth texture that pick up the red surrounding it, and a strong light source hitting it in the center, and resulting in the shadow beneath on the stump.