RAPAPORT… Mountain Province Diamonds saw the average price of rough at
its September sale fall to the lowest level yet, as the tender included an
unusually large proportion of small stones and fewer high-end goods.
The company sold 463,000 carats of rough diamonds at an
average price of $59 per carat, bringing total proceeds to $27.1 million, it said in
a statement Monday.
The sale of goods from the company’s Gahcho Kué mine in
Canada featured a relatively high volume of diamonds, as a procedural change by
the Government of the Northwest Territories enabled the miner to bring smaller
rough to the market sooner than it could in the past. However, this had a
negative effect on the average selling price.
The sale also included fewer fancy and special diamonds than
previous tenders did, as De Beers, Mountain Province’s partner in the mine, won a bid for these goods. While the two companies share the
standard, or “run-of-mine,” production among themselves according to their
stakes in the project, they compete against each other for the fancy and
special stones.
Production at Gahcho Kué started in September 2016, with
Mountain Province’s first sale taking place in January. Sales at the first
three tenders, which took place in the first quarter, averaged $72 per carat.
This rose to $86 per carat at the May sale and to $95 per carat in June, before
slipping to $72 per carat the following month.
Mountain Province owns 49% of the mine, with De Beers
holding 51%.
Average Price Drops at Mountain Province Sale
The Bottom Line
- The September tender sold 463,000 carats at an average price of $59 per carat, totaling $27.1 million in proceeds.
- A procedural change by the Northwest Territories government allowed earlier sale of smaller rough diamonds, increasing volume but lowering average price.
- Fewer fancy and special diamonds were available as De Beers secured those lots, impacting the overall average price compared to previous tenders.
Summary by Rapaport AI
More Stories

91ct. Starlight Diamond Necklace to Headline Christie’s Shanghai
William Goldberg jewel carries high estimate of $2.7 million.

IGI Revenue Jumps Amid Lab-Grown Demand
Revenue up 31% year on year in second quarter.

Kering Jewelry Delivers Strong Performance
Segment, which includes Boucheron and Pomellato, records double-digit growth in third quarter.
