Tiny black holes and bubbles, surface imperfections or different colors for similar products part of the same collection made with reactive glaze. Different weights, different sizes, different shades, irregular patterns, tiny irregularities of contact parts, color concentration in natural deposit, signs of connections between different elements are all intrinsic characteristics that represent the uniqueness of each article. They are NOT attributed to a manufacturing flaw, thus not eligible for "defective or damaged" items to return.