At Spectra Gemological Testing Laboratory (SGTL), we are committed to upholding the highest standards of gem testing and certification. Our mission is to provide accurate, transparent, and impartial reports that safeguard trust within the gem and jewelry industry. With advanced technology and a team of certified gemologists, we ensure every report reflects precision, authenticity, and global credibility.
At Spectra Gemological Laboratory, we don’t just test gems — we protect trust, value, and authenticity. With global standards and cutting-edge technology, we deliver certifications that the industry relies on.
Precision-driven grading and identification.
Reports accepted and trusted worldwide.
Certified professionals with deep expertise.
Delivering trusted, transparent, and precise gem testing that empowers jewelers, traders, and collectors with confidence and clarity.
To be the most trusted global name in gem certification, setting standards of excellence, integrity, and innovation in the jewelry industry.