Harry Winston Diamond Corporation’s share price has dropped nearly 29% since it released its last earnings report on September 7, the Financial News Network reports.

When the report was released, its share price was $15.01. The most recently updated share price appearing on the corporation’s website was $10.67, a loss of 28.9%.

According to FNN, the past 52 weeks have seen Harry Winston’s share prices range from a low of $10.36 to a high of $18.23.

The figures published earlier this month stated that the diamond company’s luxury brand sales were up 98% year-on-year at a total of $132.8 million, while its diamond production had increased 11% year-on-year. Rough diamond sales, however, were down from 0.78 million carats in Q2 2010 to 0.57 million carats for the quarter reported.