More seashells! I love the brown, rust, white and tans of these different shells. This is an 8 x 8 canvas panel. Cowrie shells have an interesting history. For hundreds of years they were used as money in parts of Africa. Slave traders used cowrie shells to trade for human slaves. In the 1680’s, a slave cost 10,000 shells. In 1770 the cost for an adult male slave was 150,000 cowrie shells. For more information about this painting, click here.