Gem dealers are professionals who buy, sell, and trade precious and semi-precious stones, such as diamonds, emeralds, and sapphires. They often work in jewelry stores, at gem shows, or through online platforms, providing customers with a variety of gemstones for personal use or investment. Gem dealers typically have extensive knowledge about the quality, value, and characteristics of different stones. To ensure authenticity and value, gem dealers may also offer certification services, which verify the quality and origin of the gemstones. They often build relationships with miners, wholesalers, and collectors to source their inventory. This network helps them provide a diverse selection of gems to meet customer demands.