Dating porcelain shards
Later, a cobalt blue glaze became popular in Islamic pottery during the Abbasid Caliphate, during which time the cobalt was mined near Kashan, Oman, and Northern Hejaz.
In the early 20th century, the development of the classic blue and white Jingdezhen ware porcelain was dated to the early Ming period, but consensus now agrees that these wares began to be made around 1300-1320, and were fully developed by the mid-century, as shown by the David Vases dated 1351, which are cornerstones for this chronology.
Often, the top layer of colour or pattern can have been buffed away by silt and sand.
Some pieces will have patterns of leaves, flowers etc and are enjoyed simply for their aesthetics.
There are ways that experts can date a piece by looking at materials, shapes, firing methods etc.Much of the sea pottery in the United Kingdom and United States originated from discarded 18th and 19th century porcelain made in Europe and America.Some sea pottery contains discernible patterns, such as flowers, figures, historic places and scenes, or hallmarks, factory stamps and dates which allow the pottery to be dated using pottery reference guides.It is very collectible and good quality specimens are popular for jewellery making.Smaller pieces look wonderful in mosaics and other artistic projects.
Sea pottery is broken pottery, porcelain, tile and stoneware shards that have been tumbling and smoothing naturally in the sea for decades before washing up on the shore.