Yuan Dynasty Guan ware Celadon Teabowl with Pasted Tortoise Design

A celadon bowl made in the Yuan dynasty. It spreads out in an octagonal shape from a round bottom and stretches upward around the waist. It has a straight and uniform octagonal rim that spreads outward under the rim. A tortoise decoration is pasted on the prospect. Black clay containing a lot of iron is covered with a semi-devitrified light bluish-green glaze from the Southern Song Dynasty Guan ware system. The tortoise pattern is made by thinning the glaze and allowing the iron-rich clay to show through. It is a product made by calculating the fine pattern down to the light and shade of the glaze. There is no conspicuous flaws.It has good luster throughout and is in good condition.