Luiseno Mission Coiled Basket

Ten (10) checkerboard diamonds are in stark contrast to a relatively pale sumac background. This bowl is entirely generous in its scale.  

"Unknown artist" is appropriate when a work of art is unsigned and a supported opinion about who made it is not available (on Savvy Collector).. "Attributed to" precedes the name of an artist when information suggests that it likely was made by that artist (on Savvy Collector).