GUILD
Straight Color Zoning

GUILD Institute of Gemology

KNOW YOUR GEMS

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WHO WE ARE

About Institute

For over 45 years, GUILD has been at the forefront of gemological excellence, combining world-class laboratory services with comprehensive education programs — including immersive field expeditions to the world's most significant gem origins.

45+
Years of Excellence
100K+
Alumni from different fields
Our Foundation

Built on Four Pillars

A-Type Samples, laboratory expertise, global field expedition programs, and expert instructors

Gem
01

A-Type SamplesPremium Collection

Vast collection of high-quality A-Type Samples for hands-on examination and authentic gemological education.

Laboratory
02

45 Years Lab ExcellenceGUILD Laboratory

1.5 million+ gemstone examinations backed by GUILD Gem Laboratory's 45 years of expertise in real-world market practices.

Market
03

Global Field GemologyField Expedition Programs

Over two decades of immersive field expeditions — taking students to mines, pearl farms, and trading markets worldwide for direct, on-the-ground gemological education.

Education
04

Expert Gemologist InstructorsLab + Education Model

Professional gemologists with extensive laboratory testing, mine researching and teaching expertise.

Field Programs

Expedition Programs

The cornerstone of GUILD education — immersive field programs across the world's most significant gem origins, from active journeys to what's ahead.

All Programs2
Course Type 01

Field Expedition Program

Our signature learning experience — journey to legendary mining regions with leading field gemologists and build practical expertise at the source that no classroom alone can provide.

01/ 04
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Field Expedition Program
Field Expedition Program detail
Course Type 02

In-Class Course

Immersive hands-on training in our state-of-the-art Classrooms with direct mentorship from experienced lecturer.

02/ 04
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In-Class Course
In-Class Course detail
Course Type 03

Online Learning

Study at your own pace with comprehensive digital curriculum, interactive modules, and live Q&A sessions.

03/ 04
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Online Learning
Online Learning detail
Course Type 04

Enterprise Training

Custom training programs designed for jewelry houses, auction houses, and gemological laboratories.

04/ 04
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Enterprise Training
Enterprise Training detail
WHERE WE ARE

Global Presence

From world-class laboratories to legendary gem mining regions — and the field expedition routes that connect them — GUILD's global network brings you closer to the heart of gemology.

World Map
Los Angeles, USA
Laboratory
Bogotá, Colombia
Field Expedition
Rio de Janeiro, Brazil
Field Expedition
Maputo, Mozambique
Field Expedition
Madagascar
Field Expedition
Beruwala, Sri Lanka
Laboratory & Field Expedition
Bangkok, Thailand
Laboratory & Field Expedition
Hong Kong, China
Laboratory
Shenzhen, China
Laboratory & Classroom
Guangzhou, China
Laboratory & Classroom
Zhuji, China
Laboratory & Classroom
Hangzhou, China
Classroom
Shanghai, China
Classroom
Beijing, China
Classroom