After the July declines, polished diamond prices were flat in August. The Mercury Diamond Global Tracker™ (MDGT™) averaged 113.85 in August 2018, up 0.03% over July. This is not unusual behavior for prices in August, a period of limited activity between polished diamond wholesalers. Polished trade is generally very limited, as traders are on their summer vacations. Historically, prices fluctuate very mildly in August, and at times are unchanged.