Polished month-to-month diamond prices for May showed a marked increase of 0.6 per cent, the most significant rise since December 2018. For almost two years there has been a general pattern of decrease rather than increase, with prices plunging in March, down 1.7 per cent. Prices recovered in April (down just 0.3 per cent) and now, according to figures for May, they are actually increasing.
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