GIS (Gem Research Institute of Switzerland) is an independent gemological laboratory dedicated to gemstone identification, grading, and scientific research in crystal materials. Serving clients worldwide, GIS provides reliable, transparent, and science-based gemological services.
Comprehensive testing and grading for natural and laboratory-grown colored gemstones.
LEARN MORE →Advanced analytical services for crystal materials and related research.
LEARN MORE →· Organization: Gemological Research Institude of Switzerland
· Email: swiss@gis-report.com
· Website: https://www.gis-report.com