Scientific Jewelry Testing and Analysis (SJTA) Gem Lab is a gemological laboratory focused on the identification and analysis of gemstones and jewelry. We are dedicated to providing professional services to ensure the authenticity and quality of gemstones, following international standards. The founder of SJTA Gem Lab brings decades of experience in the gemstone industry.

His career began in 2013, when a passion for gemstones evolved into a profession built on dedication. Since then, his experience, knowledge, and network within the gemological industry have continued to grow, ultimately leading to the establishment of SJTA Gem Lab as a trusted gemology service center in Bali, Indonesia.

We use gemological instruments that meet international standards, along with analytical methods recognized in the field of gemology. This ensures that every identification report—whether for gemstones or jewelry—provides accurate, clear, and reliable information.

With a commitment to professionalism and transparency, SJTA Gem Lab stands as a trusted partner for collectors, traders, and gemstone enthusiasts seeking assurance in the authenticity and value of their gemstones.