Clay and stone: why the same shape has three prices
A cup can be slip-cast, thrown and then finished by hand, or made by one potter from start to finish. At thumbnail size the photographs are identical. The prices differ by a factor of three, and the clay is rarely the reason.
Why this family cannot be judged from a photograph
Porcelain is not made, it is fired. Temperature is not even inside a kiln — the difference between the edge and the centre can run to tens of degrees, so the same glaze on the same day comes out a different colour depending on where a piece stood. This is why “the same as the sample” needs defining in ceramics in a way it does not in wood or textile. It is also why a photograph is the wrong instrument: the camera flattens exactly the variation you are trying to judge.
Yield is the hidden variable in every ceramic quotation. To deliver a hundred pieces you have to fire more than a hundred, because glaze faults, warping, pinholes and kiln cracks each take a share. A low quote is often not a more efficient workshop — it is a lower grade being packed, or a shape whose failure rate nobody has told you about.
Stone runs on a different logic again. Jade, ink stone and seal stone carry the risk of the material: cracks and inclusions that cannot be seen until the block is opened. Ceramics price the risk of the kiln; stone prices the risk of the block. In both cases the buyer is paying for the risk, and in both cases it is legitimate — as long as somebody says so out loud.
Three ways to make the same cup
| Slip-cast | Thrown and finished | One potter, start to finish | |
|---|---|---|---|
| Forming | Liquid clay poured into a plaster mould | Machine or wheel, then trimmed and handled by hand | Wheel-thrown, trimmed, handled and glazed by one person |
| Time per piece | Minutes | Tens of minutes | Half an hour and up, plus drying decisions |
| Batch consistency | High — pieces are identical | Medium — trimming and handles vary by hand | Low — no two are the same, by design |
| Minimum order | Usually the highest | Middle | Usually the lowest |
| Fits what | Volume gifts, complex shapes, tight budgets | Retail ranges that need to look consistent | High-value pieces, museum shops, one-off commissions |
All three are legitimate products. The problem is only when a quotation describes one and delivers another — which is common, because the photographs are the same.
Six traditions, one question each
Porcelain and celadon
Jingdezhen, Longquan, Dehua, Liling. The question is not which kiln but which grade: the same shape is made for gift boxes and for museum cases, and the difference is in the selection, not the mould.
Yixing purple clay
Yixing. Hand-built from slabs or thrown, then finished with tools. Slip-cast teapots exist and look convincing; the give-away is inside the spout and under the lid, where a mould leaves a seam.
Clay figurines
Wuxi, Tianjin, Fengxiang. The cheapest tradition on our list and the one most often replaced by resin copies, which are lighter, uniform and photograph well.
Jade carving
Suzhou, Jieyang, Nanyang, Xiuyan. The stone decides the design: a carver works around inclusions rather than removing them, and the best pieces use a flaw as part of the composition.
Ink stones
Zhaoqing, Shexian, Gansu, Shanxi. What matters is the quality of the stone face — how it grinds ink and whether it holds the pool — not the carving on the lid, which is what the photographs show.
Seal stone and Yuhua pebbles
Fuzhou, Qingtian, Changhua, Inner Mongolia. Shoushan and Qingtian are the two names buyers ask for; both are quarried in grades, and the grade is set by colour, translucency and whether the stone is stable.
What goes wrong
The sample is hand-made and the bulk is cast. This is the single most common substitution in the family, and it survives inspection because both pieces are the right shape and the right colour. It does not survive being weighed.
Colour variation explained away as “kiln transmutation”. Some variation is genuine and beautiful — Jun ware is built on it. But variation between two pieces that were supposed to match is not kiln magic, it is two different firings.
A crack found after arrival. In jade and seal stone the flaw is often inside the block. A supplier who has not examined the stone before carving has passed that risk to you, usually without saying so.
The question that separates a quote from a guess: what percentage of the production run is being rejected before packing, and what grade am I being quoted for? A workshop that answers both has shown you how it thinks. One that answers neither has quoted you a photograph.
Sourcing ceramics or carved stone?
Send the shape, the quantity and the standard you need to hold. We will come back with two to four workshops and a sample that has been measured, not just photographed.
Send a sourcing request