Johannesburg—A 39-carat blue diamond is on display in South Africa, as part of mining company Petra Diamonds Ltd.'s latest tender.

Mumbai, India—The Gemological Institute of America (GIA) India Laboratory has announced it will offer free pick-up and delivery services in Mumbai's Opera House district.

Newport Beach, Calif.—Collectors Universe Inc., the parent company of two diamond- and gemstone-grading laboratories, reported revenues fell 4 percent in the fourth quarter of 2008 despite steady growth in its jewelry division.

London—Mining company Gem Diamonds, in cooperation with the government of the Kingdom of Lesotho, recovered a 478-carat diamond from a mine in the African kingdom, the company announced recently.

Geneva, Switzerland—India-based manufacturer Venus Jewel is now a member of IDEX Online SA's online diamond-trading platform, according to a release from IDEX.

Sarasota, Fla.—Gemesis, the Florida-based company known for its lab-grown colored diamonds, has redesigned its Web site.

Antwerp, Belgium—HRD Antwerp NV marks another milestone in its global expansion with the opening of its Lab Link service in Dubai, United Arab Emirates.

Dar Es Salaam, Tanzania—De Beers Sociétété Anonyme has agreed to sell its stake in a Tanzanian diamond mine to Petra Diamonds Ltd. for $10 million, De Beers announced this week.

Las Vegas—The American Gem Society's (AGS) new Performance-Based Cut Grading System has received its fourth patent, the AGS announced.

Antwerp, Belgium—The 24th annual Rio Tinto Argyle Pink Diamond Tender got underway last week in Australia, and will continue through Oct. 2 in cities all around the globe.