Gresso, the Russian luxury phone manufacturer, will soon release other two highly expensive handsets, included in the new "Avantgarde White Diamonds" collection.

After the Sol Steel and Luna Steel devices were unveiled, at the end of March, the Russian company now comes with Gresso White Diamonds and Gresso Royal White Diamonds, both being (obviously) encrusted with diamonds.

In terms of design, the new phones are not different from the other handsets that Gresso rolled-out until now, hence they're simple but elegant candybars. Moreover, most of the materials used in the Diamonds phones are the same: African blackwood (said to be more than 200-years old), titanium, sapphire crystal glass, stainless steel and leather. What makes the new devices different is their keypad, for which the manufacturer used diamonds.

Gresso White Diamonds is the "cheap" device from the two new ones, coming for 9,000 Euros (about $14,135). Aside from the materials listed above, the handset also brings white diamonds, crafted into its navigation pad.

Gresso Royal White Diamonds is truly suited to bear the "royal" name, as it will cost no less than 33,000 Euros ($51,430). Unlike the other White Diamonds phone, this one has all its keys made out of diamonds, that's why its price is so expensive.

When it comes to technical specs, the new handsets don't excel, but they still offer some nice features (similar to the ones packed in the previous Gresso devices): a 240 x 320 pixel TFT display with 65K colors, Windows Mobile 6, a 2 Megapixel camera with video recording, Bluetooth, expandable memory and so on.

The first public appearance of the new Gresso phones will take place in Las Vegas, during the JCK fair which debuts on May 30. Shortly after, the luxury handsets should be available for purchase.