Leviev presents one of the greatest selections of high-quality diamonds in the world in a wide range of jewelry designs. Its selection includes rare colored diamonds along with exceptional rubies, emeralds and sapphires. Inside Information: 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. Since 1995, Leviev has acquired interest in mines in Angola, Russia, Namibia, and South America among other locations, and the best of the crop is reserved for his own stores. 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.