Est. 1980
About Us
Science. Field. Knowledge.
Mission & Vision
Our Mission
To advance the gemological sciences through rigorous research, transparent reporting, and accessible education — bridging academic knowledge and industry practice with verified, field-based insights that professionals worldwide can trust and apply.
Our Vision
A global standard for gemological excellence where scientific rigor, educational accessibility, and industry relevance converge — supporting informed decision-making for every professional throughout the supply chain.
What We Do
Three interconnected domains, each reinforcing the others through shared knowledge and methodologies
Laboratory Services
Professional gemstone testing and certification backed by field-verified protocols and reference standards.
Explore →Education & Training
Comprehensive gemology programs from beginner to expert, taught by field-experienced instructors.
Explore →Research & Publications
Peer-reviewed research, field studies, and knowledge sharing advancing the gemological sciences.
Explore →Our Leadership
The experienced professionals who guide GUILD's global gemological mission
Ruby Liu
President and Founder of GUILD Gem Laboratories AsiaCo-founder of GUILD Institute of Gemology
