Jewel was from the collection of Queen Nazli, former queen mother of Egypt.
A Kashmir sapphire and diamond ring was the top seller, fetching $856,800.
Nearly all lots sold at auction, which garnered total of $19 million.
Last year saw highly promotional environment in natural and synthetics, according to CEO Gina Drosos.
Diamond is fifth largest ever recovered from deposit.
Spending will reach between $5.23 trillion and $5.28 trillion, federation forecasts.
Members of the editorial team pick their favorite pieces from the internet.
The synthetic-diamond market has hit another pivotal point as it continues on a growth path.
Fresh off the success of its deal with De Beers, the government is concerned the new measures will be a step back for its diamond industry.
Is India Importing Too Many Diamonds?