When you look at a celadon bowl, you are looking at 1,700 years of accumulated intention. The glaze — a thin layer of glass on the surface of clay — was developed in Longquan during the Northern Song dynasty. The potters were trying to replicate the colour of jade, which they could not afford.
They failed, and in failing, created something new. Celadon green is not jade green. It is greener than jade, and more translucent. It catches light differently. Where jade is dense and opaque, celadon is luminous — the glaze pools at the edges and thins at the centre, creating a gradient that changes with the angle of view.
The kilns in Longquan have been firing almost continuously since the 10th century. During the Southern Song, celadon was exported to over 50 countries — it was the first global Chinese craft. The Dutch called it 'green porcelain' and paid for it in silver.
Today, the kilns still fire. The glaze recipe has changed little. The clay is still dug from the same hillside. The firing still takes 30 hours, and the reduction atmosphere still requires the kiln master to judge the temperature by the colour of the flame.
What has changed is the context. A celadon bowl in the 12th century was a luxury item, displayed in a palace. Today, it is a $55 bowl that you can use for rice. The craft has not been degraded by accessibility — it has been fulfilled. The potters who invented celadon wanted to make objects that were used daily. They just could not afford to themselves.