La Chamba Black Clay Casserole, Large (3 Qt) Timeless Chamba cookware is handmade in Colombia from clay that contains mica which allows it to withstand heat. All-natural and unglazed, it contains no toxins. Chamba can be used in the oven and microwave--even on the stovetop and grill! It cleans up easily and should not be put in the dishwasher. Because Chamba cookware is handmade, dimensions are approximate; actual size may vary.