• The business was started in 1908 by James Boulton and Stephen Hawthorn. Announcements were made in the April and May 1908 Pottery Gazette.  

• Both Boulton and Hawthorn were also partners, amongst others, in the Pearl Pottery Co also in Brook Street. It is most likely that both companies operated from the same premises. 

• Geoffrey Godden 'Encyclopedia of British Pottery & Porcelain Marks' states that Diamond Pottery was formerly Pearl Pottery - however this is not correct, both companies continued until 1935/6.  

• In May 1914 an Extraordinary General Meeting was held that determined that the Diamond Pottery Company could not meet its liabilities and was to be wound up. The chairman was W. Brookfield. (The London Gazette 29 May 1914). Although a liquidator was appointed arrangements must have been made to satisfy the creditors as the business continued. 

• The Diamond Pottery Co closed in 1935. In 1936 the 'sister' company Pearl Pottery Co was purchased by the New Hall Pottery Co  "to enlarge its capacity"

Diamond Pottery Co., Ltd - Registered capital, £3,500 in £1 shares. Objects, to adopt an agreement with J. Boulton and S. Hawthorn, and to carry on the business of manufacturers of earthenware, porcelain, china and other articles made from marl, clay, or earth, &c. 
Registered office, Diamond Pottery, Brook St., Hanley. 

D P Co
L

Dresden Pottery Co
Longton 

B P Co Ltd
Diamond China

Blyth Pottery Co Ltd

Diamond China

Blyth Pottery Co Ltd

none of these marks are those of the Diamond Pottery Co Ltd