barro negro or black clay pottery
... that the color of barro negro or black clay pottery comes from the properties of the clay and not from painting?
... that the color of <b id="mwBtI"><a href="./Barro_negro_pottery" id="mwBtM" rel="mw:WikiLink" title="Barro negro pottery">barro negro or black clay pottery</a></b> <i id="mwBtQ">(pictured)</i> comes from the properties of the clay and not from painting?