The Obsidian Prism: Song-Style Hand-thrown Jianshui Gaiwan

1300°C Reduction Firing | “Bu Er Tao” Studio | 10-Day Kiln Ritual | 170ml

At ZENTAOEAST, we seek vessels that don’t just hold tea, but hold the energy of the fire. The Obsidian Prism is a contemporary tribute to the Song Dynasty tea ritual. Hand-thrown from the fine, silken silt of Jianshui and tempered in a dragon kiln for up to ten days, this 170ml Gaiwan is a monument to the “Architecture of Silence” and the hidden science of clay.

The Aesthetic: Song Elegance, Modern Soul

This Gaiwan is a reimagining of the classic Sancai (Three Talents) form—representing Heaven (lid), Earth (saucer), and Humanity (bowl).

• The Silhouette: Inspired by the Douli (Conical Hat) shape, it features a wide opening and a shallow, sloping body. This design allows the tea’s aroma to rise freely, creating an immediate sensory connection.

• The Cup-Shaped Knob: A unique design departure—the lid is crowned with a small, cup-like knob, offering a stable and ergonomic grip that remains cool to the touch.

• Fluidity of Form: Unlike the geometric “bone” of Yixing teapots, this Gaiwan is hand-thrown on a wheel. Every line is a record of a fluid motion, preserving the organic vitality of the clay as it spun under the master’s hand.

The Alchemy of Iron: The Prism Effect

The captivating iridescent luster—a play of deep purples, bronzes, and metallic blues—is a natural phenomenon known as Kiln Change (Yáo Biàn).

• Mineral Diffraction: Jianshui red clay is incredibly rich in iron. During the 10-day reduction firing, iron ions form unique crystalline states. Under sunlight, these crystals act like a prism, diffracting light into a spectrum of colors.

• The Melted Soul: At 1300°C, the pine ash doesn’t merely sit on the surface; it melts entirely, acting as a flux that fuses with the clay’s silica to form a natural, self-originating glaze. This absence of raw ash is the mark of a “Sufficient Fire”—a vessel that has reached its physical limit.

• Orange Peel Texture (Jú Pí): A subtle, dimpled texture marks the surface. These are the “scars of fire”—micro-pores where volatile minerals gasified, only to be sealed by the molten clay, resulting in a skin that is as tactile as it is visual.

Jianshui vs. Yixing: The Soul of the Silt

Understanding the material is essential to the ritual:

• The Material: While Yixing Zisha is a “sandy” clay, Jianshui Zitao is an extremely fine silt. Its high density and vitrification make it the supreme choice for brewing Aged Puerh and Wuyi Rock Teas, as it retains high temperatures to force out the tea’s deepest mineral “Qi.”

• Aesthetic language: If Yixing is the beauty of linear bone, Jianshui is the beauty of fluid skin—warm, moist, and deeply responsive to the touch.

Practical Stillness

At 170ml, this is a generous and stable vessel. Its low foot-ring ensures a grounded presence on your tea table. On its base, it carries the seal of the studio: “Bù Èr Táo” (不二陶 – Non-Dual Pottery).

Curator’s Verdict

“The ‘Obsidian Prism’ Gaiwan is a bridge between the dream of a Song Dynasty Emperor and the hands of a modern master. I was moved by the depth of its ‘skin’—it feels like holding a piece of cooled starlight. I chose this for our collection because it demands that you pay attention to the light. It is a ‘Lifelong Companion’ that will grow oilier and more soulful as it absorbs the stories of your tea path.”

— Richard Zhang, Founding Curator