About Us


The key to a regular output of high-quality polished colored gemstones is a consistent supply of rough goods, and to manage that Advanced Quality A.C.C. goes right to the source. The company operates jointly owned buying offices in Arusha, Tanzania; Nairobi, Kenya; and in several locations in Madagascar. The rough gemstone suppliers have been working together with Advanced Quality’sfounder, Menahem Sevdermish, for more than 30 years. Advanced Quality’s strategy of buying its rough at source was part of deliberate strategy to ensure that the company is always able to acquire quantities of top-quality, natural gemstones, devoid of any treatments.

The company specializes in the production of superbly cut smaller-sized goods, from 1.8 millimeters in diameter to 2.0 carats. In addition, and on an ongoing basis, Advanced Quality manufactures special cuts in sizes up to 35 carats for a number of the world’s most exclusive jewelry producers. These ranges of production demand a ready supply of high-quality rough, and this is managed through the operation of the buying offices in Africa. In Tanzania and Kenya, Advanced Quality sources tanzanite; tsavorite (green garnet), chrome tourmaline, earth-colored tourmaline, hot pink spinel, fine quality amethyst and rhodolite, and fine quality Mozambique red garnets. In Madagascar the company sources sapphires in the pink, violet and orange colors, rare high-quality blue sapphires, rubies; rare aquamarines and rare color-change garnets.