Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: Augustus Vallette Van Horne, Jr.
Dated: ca. 1793
Medium: Watercolor on ivory in rose gold locket; hair reserve verso
Dimensions: Sight: 2 3/8 x 2 in. (6 x 5.1 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY