Yixing Zisha Clay Guide: Types, Origins and Preparation
At Yixing Teaware, all of our Zisha teapots are made from genuine Yixing Zisha clay. Purple-brown, brick red, warm gold and pale yellow are all part of the material's expressive range. Understanding how these clays are prepared—and how their names relate to their appearance—makes a teapot more rewarding to choose and appreciate.
This illustrated guide follows the material from raw ore to workable clay, then introduces 17 clay names and material terms found in the Yixing tradition. Start with the four familiar groups: Zi Ni, Hong Ni, Lü Ni and Duan Ni. The more specific names become easier to understand from there.
1. Where does Yixing Zisha clay come from?
Yixing is in Jiangsu Province, China. Within its pottery tradition, Huanglongshan—the “Yellow Dragon Mountain” in the Dingshu area—is one of the central names associated with Zisha raw materials. The material begins as mineral-bearing deposits, not as the soft, ready-to-shape clay seen on a potter's workbench.
A piece of raw material and a finished teapot can look strikingly different. Crushing, preparation and firing transform the material's texture and color. A pale or yellowish raw clay can produce a red body; a dark raw material does not necessarily produce a black pot.
Zisha is a ceramic raw material made up of multiple mineral components. Research on purple-clay samples identifies minerals including quartz, clay minerals, mica and hematite. The balance of these components, together with preparation and firing, contributes to the finished body.
Clay names describe different things. Zi Ni and Lü Ni refer to color; names such as Ben Shan Lü Ni carry a place association; Huang Jin Duan evokes the golden fired appearance. Other names come from workshop practice or the way a material was prepared. Learning these distinctions is more useful than treating every name as a separate mineral.
2. How raw Zisha material becomes pottery clay
Traditional clay preparation turns hard raw material into a consistent body that an artisan can shape. The following stages describe the process shown in the reference photographs.
Weathering and careful selection
Raw material is exposed to natural weathering, which helps it break down into smaller pieces. The material is then sorted, with unwanted inclusions removed. This selection stage helps prepare a more consistent batch for grinding.
Grinding and controlling particle size
The selected material is crushed and ground. Particle size is part of the clay's character: a fine body and a visibly granular body offer different working and surface qualities. “Sand” in Zisha describes this mineral and granular character; it does not mean that every visible particle is loose sand added to the clay.
Adding water and working the clay
Water is mixed into the prepared material to make a workable body. Thorough mixing and working help distribute moisture throughout it. The clay is then beaten or otherwise worked into blocks, ready for storage and later use.
Resting and aging
The prepared clay is kept covered and allowed to rest, a stage known as chenfu (陈腐). Moisture becomes more evenly distributed through the body, helping it reach a suitable working consistency. It can then be prepared for forming the teapot.
Single-source clay and clay blends
A clay body can be prepared from one selected raw material or from a combination of clay materials. A natural association is formed in the deposit; a prepared blend is combined during clay preparation. These are different routes to a ceramic body. Blending genuine Zisha materials does not, by itself, make the result counterfeit.
The expression yuan kuang (原矿), usually translated as “original ore,” refers to the raw material. It does not mean that the ore goes straight from the ground into a finished teapot: sorting, grinding, adding water and working the clay remain necessary.
3. An illustrated guide to Zisha clay types and names
The names below follow the traditional descriptions in our reference material. The photographs show examples of raw material, finished teapots and surface details. They are educational illustrations, rather than a list of products currently available in our store.
1. Zi Ni (紫泥): purple clay
Zi Ni is the familiar purple-clay family. Its fired palette includes reddish brown, purple-brown and deep brown rather than a single bright purple. Look closely at an unglazed surface and you can see the fine granular character that gives a simple form visual depth.
Zi Ni is a useful starting point for understanding Zisha: color, particles and the overall surface work together. A darker shade is a visual characteristic, not a separate quality grade.
2. Di Cao Qing (底槽青)
Di Cao Qing is a well-known name within the purple-clay tradition. The reference comparison shows hard, layered raw material above a finished reddish-brown teapot. It illustrates how much the material changes between extraction and firing.
In English listings, the name also appears as Dicaoqing. The Chinese name is useful when comparing descriptions written with different spacing or transliteration.
3. Tian Qing Ni (天青泥)
Tian Qing means “sky blue,” but the name should be understood through the clay tradition rather than as a paint color. The illustrated example has a muted blue-gray to charcoal appearance, with small light points visible in the body.
The reference describes different fired tones under different firing conditions. This is a good example of the kiln's role in developing a clay body's final appearance.
4. Hong Ni (红泥): red clay
Hong Ni means red clay. The finished red color and the raw material's color are not the same thing: the illustrated samples range from reddish material to a much lighter yellowish material. The labels distinguish Da Hong Ni and Xiao Hong Ni.
When looking at red-clay teapots, pay attention to both the warmth of the fired color and the texture of the body. The broad name Hong Ni covers more than one exact shade or raw appearance.
5. Huang Jin Duan (黄金段): golden Duan clay
Huang Jin Duan is known for its warm golden-yellow fired appearance. The example below combines a yellow body with small darker and reddish particles, giving the surface more depth than a flat, uniform color.
The words “golden Duan” describe this recognizable visual character. It is one of the names encountered within the wider Duan Ni group.
6. Jiang Po Ni (降坡泥)
Jiang Po Ni takes its name from material associated with slope reduction during road construction between Huanglongshan and Qinglongshan. Its appeal lies in its varied granular texture and warm fired tones.
In the illustrated pot, lighter particles are scattered through a reddish-brown body. These small contrasts become particularly noticeable across rounded shoulders and broad, simple surfaces.
7. Lü Ni (绿泥) and Ben Shan Lü Ni (本山绿泥)
Lü Ni means green clay, a name associated with the raw material's gray-green appearance. The finished teapot does not have to be green. Pale yellow and yellow-green tones are part of the visual range represented in the reference.
Ben Shan Lü Ni is the name associated with Huanglongshan material. The photograph below shows a light body with a fine, speckled texture.
8. Mo Lü Ni (墨绿泥)
Mo Lü Ni translates as “ink-green clay.” The reference uses this name for dark raw material, illustrating another reason to distinguish the appearance of the ore from the appearance of the finished vessel. It belongs among the more specific names encountered when studying Zisha materials beyond the basic clay groups.
9. Qing Hui Zi Ni (青灰紫泥)
Qing Hui Zi Ni means blue-gray purple clay. The reference presents both reddish and grayish fired examples beneath the raw material. The comparison draws attention to how firing can develop different tones within a clay body.
For the viewer, the important detail is the combination of subdued color and visible texture—not an expectation that every pot bearing the name must match one photograph exactly.
10. Duan Ni (段泥): a varied clay group
Duan Ni is a broad and visually varied group. Names such as Ben Shan Duan, Huang Jin Duan and Lao Duan appear within discussions of it. Yellow, buff and warm brown bodies, often with contrasting particles, are familiar examples.
Naturally associated materials are an important part of this tradition. The term is also discussed alongside Tuan Ni (团泥). Rather than expecting one fixed color, look at the particular clay name and the fired surface together. The golden example above and the naturally associated material below show two different aspects of this wider subject.
11. Zhu Ni (朱泥): vermilion clay
Zhu Ni, often written Zhuni, is associated with red fired bodies. The reference shows yellowish raw samples labeled Zhaozhuang Zhuni and Huanglongshan Zhuni, demonstrating that a red teapot can begin with a much paler raw material.
In this guide, Zhuni refers to the Yixing tradition. The same English wording should not erase the distinction between Yixing materials and other regional red-clay pottery traditions.
12. Qing Shui Ni (清水泥)
Qing Shui Ni is especially useful for understanding naming by preparation. In its traditional sense, it describes a selected raw clay prepared without blending in other clay materials. In present-day clay discussions, the name is also commonly associated with reddish-brown purple clay.
It is therefore a preparation-related term with an established usage, rather than the name of one chemical mineral.
13. Shi Huang (石黄) and Shi Hong (石红)
Shi Huang and Shi Hong are hard, iron-rich materials discussed as ingredients in clay preparation. The names evoke yellow and red raw appearances. They are relevant to the formulation and fired color of a body, rather than simply being two more standard ready-to-use potter's clays.
This distinction helps separate a finished clay body from the individual natural materials used to prepare it.
14. Tu Gu (土骨)
Tu Gu is another preparation-material term. The reference describes hard, iron-rich nodules used to adjust a body's character and color. It should be understood in that role, rather than as a standalone clay selected and shaped in the same way as a prepared Zi Ni body.
15. Li Pi Ni (梨皮泥): pear-skin clay
Li Pi Ni takes its name from the resemblance of its fine, speckled surface to pear skin. The reference places it within the green-clay discussion and illustrates a pale yellow body with small contrasting flecks.
Its visual character is subtle: the particles and soft background color reward a close look, particularly on broad, gently lit surfaces.
16. Wu Ni (乌泥)
Wu Ni is described in the reference as a dark, compact raw material with visible light-colored mineral fragments. Its fired example is described in brownish-red and yellowish tones. The name again highlights the raw material, while the finished body tells a different part of the story.
17. Gong Sheng Kuang (共生矿): naturally associated material
Gong Sheng Kuang describes different materials occurring together naturally in a deposit. It is a geological relationship, not a single fired color. Transitional areas bring together materials with contrasting appearances.
A naturally associated material is different from a blend made during preparation. Both concepts help explain why Zisha is more varied than a simple chart of four uniform colors suggests.
4. Putting this knowledge to use
A good place to begin is the fired surface you enjoy: the depth of purple-brown Zi Ni, the warmth of red clay, or the lighter, speckled character of Duan Ni and Lü Ni. Then consider the actual teapot's size, shape and handling alongside the clay.
Our commitment is straightforward: the Zisha teapots we sell use genuine Yixing Zisha clay. We give the clay name in each product description so you can connect the individual pot with the traditions explained here.
For brewing considerations, continue with our Zisha clay and tea-pairing guide. If you are choosing your first pot, our first Yixing teapot guide covers practical selection. You can explore the available forms, capacities and clay names in our Yixing teapot collection.
Further reading
This guide adapts our Chinese-language clay reference into an illustrated English introduction. The photographs retain their original labels and show reference examples of materials and ceramic surfaces.
- Hou and colleagues, comparative study of Huanglongshan Zisha raw materials (2016)—mineral composition of sampled purple-clay materials.
- Gao and colleagues, Creating Wusetu (2025)—the materials and preparation choices behind historic Zisha bodies.