Leviev presents one of the greatest selections of high-quality diamonds in the world in a wide range of jewelry designs. The source of the company's unrivaled stone collection is its high-profile owner, Lev Leviev, the Russian business tycoon whose company Leviev Group of Companies has vast interests in international real estate, high-tech, fashion, tourism, communications, and energy. Unlike most diamond retailers and manufacturers who rely on numerous sometimes unpredictable sources for their inventory, Leviev can supply his boutiques with a seemingly endless supply of high-quality stones that are mined, cut, and polished by the vertically integrated company.