Gemlab was founded in 1975 by Ted Themelis and it is operated by his family. The company has experienced many phases in the gem & jewelry industry including gem trading, manufacturing of gem instruments, research & development projects, gem treatment services and fabrication of high-temperature furnaces with gem treatment installations around the globe.

For over thirty years, Gemlab continues to provide dependable and accurate services to our selected clients. Our focus is dedicated to quality, accuracy, service and speed. Our services are designed to help solve problems, support research & development, and provide guides for quality and assurance control. The following equipment are installed in our gem treatment lab and used in our applications and projects, as well as for training our students:

• 2 High-Temp (1800°C) electric muffle furnaces
• 2 Low-Temp (1100°C) electric muffle furnace with special controls
• 1 High-Temp (1800°C+) LPG-OXY combustion furnace
• 1 High-pressure-low temperature hydrothermal capsule-vessel
• 2 High-pressure, low-temp (10,000 psi, 250°C) apparatus