Resources

The sheared mechanism of spiral and vortex dislocation on beryl crystal (published in 29th International Gemological Conference, 2004)

Unlock the mysteries of gemological testing with our insightful articles and practical tips. From the fundamentals of gem identification to advanced testing methodologies, our content equips you with essential knowledge.

Immerse yourself in the latest gemological innovations that are transforming the way we understand precious stones. Our thought-provoking articles cover cutting-edge research, and innovative testing methods.

Mr Zeng, a highly experienced gemologist, generously shares his extensive knowledge and expertise despite his busy schedule at the gem laboratory.

This book provides a comprehensive and organized introduction to diamonds and their appraisal. It is divided into two parts.