sentences:  The Nazi boycott of Dutch and Belgian diamond dealers, brought about by the persecution of Jews in Germany, forced 13 of the 14 local independent diamond-cutting businesses to shut up shop in 1933, with the remaining one cutting back on the amount of business that it did.Low production costs due to the Nazi state's subsidies, and the high quality standard, made the boycott ineffective, so that the business reached a peak in 1935.Of the 3,500 people then working in the 150 businesses in the Palatine diamond industry, 197 diamond cutters were working at 23 diamond-cutting workshops in Herschweiler-Pettersheim.