: ,

:
22 2019 .

, , 70%.

, Bain & Co. Rapaport, , , , (Russell Shor), (Gemological Institute of America, GIA).

, , , $1 000 .
, De Beers / Lightbox, , , - , - .

Bain , , , , , , .

ĭ - De Beers - . , , .

De Beers - $490 , 13% . .

De Beers 10% 2018 - 32 35 2017 , 4%, .

, $340,6 , 23% , . , 35% 2017 . , , .

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