Pinggu Concave-Base Wenwan Walnut · 40mm · Select Ritual

Premium Pinggu Concave-Base wenwan walnut, a sought-after classic variety. Defined by its signature deep concave base (2–3mm), short stout triangular pile, plump belly, and distinct toad-like silhouette with prominent “hind legs”. Features fine pink-red skin, dense bone structure, and rich natural oil. Deep, consistent grain extends seamlessly into the concave base. Exceptionally fast and even oxidation—maturing to a glossy oxford red patina in months, with superior jade-like translucency. Perfect for daily hand play, massage, and valuable collection.