Total sales volume of diamond products by Alrosa in 6 months. 2020 was $991.1 million, which is 1.8 times less than the $1,811 million for the same period last year. Sales volume for June was $31.3 million, down 7.2 times from $222.4 million a year earlier. In June, the company for the third time in a row gave customers the opportunity to refrain from purchasing contracted volumes to support them, as well as to balance supply of diamonds with confirmed demand.