Jewelers of America has announced a partnership with the International Diamond Exchange, and will now offer its members the latest diamond pricing information and a subscription to the weekly IDEX Diamond Price Report free of charge.

After tumbling from highs realized in June, rough diamond prices have stabilized and are expected to remain at or near their current level in the coming months, London-based mining company Petra Diamonds said in a recent trading update.

Certified polished diamond prices increased in 2011, with strong buying in the first half of last year enough to offset a soft second half, the RapNet Diamond Index for 2011 shows.

Polished diamond prices rose by a solid 17 percent during 2011, according to the IDEX Online Polished Diamond Price Index.

Diamond mining company Petra Diamonds sold a 4.8-carat blue diamond for $1.45 million, equivalent to over $300,000 per carat.

Polished diamond prices softened in November as the wholesale sector of the pipeline sought a steady footing during the first half of the 2011 holiday season. The average asking price of polished diamonds was 0.2 percent lower in November than in October, according to the IDEX Online Polished Diamond Index.

Both rough and polished diamond prices have risen in Mumbai. Rough prices have gone up by 8-10 percent, while polished prices have firmed up 2-5 percent.

The market is in a recovery mode with traders once again buying and manufacturing rough goods and having positive expectations for the holiday season. In practical terms, there is some trade in rough in the secondary market again, but prices are based on a new, and lower, standard.

Global polished diamond prices slipped in October for the third consecutive month but showed some vitality near the end of the month, according to the IDEX Online Global Polished Diamond Price Index.

Global diamond prices are on a slow decline, according to the IDEX Online Polished Diamond Index. The Index closed at 1039.9 on Monday, settling below 140 for the first time since June 18.

IDEX Online announced it is launching a diamond price report for round and fancy-cut diamonds up to 5.99 carats in size.

The average price of diamonds is slowly settling down after peaking in late July. The soft decline comes after a wild uphill race and while traders feel unsure about the upcoming Hong Kong trade fair.