Pink and blue engagement rings are especially popular and have been sold at higher dollars per carat than any other loose gemstones in history. Red, green, and purple diamond jewelry are among the rarest of the rare.
The round princess cut diamond - cut is also popular so much so that it is often wrongly named as beeing brilliant cut.
One of the two principal ideal cut diamond trade routes passed through Venice. It enjoyed a monopoly of the diamond jewelry trade on its way to the main towns of southern Germany up to its final destination in Bruges.