COVID-19 Resources for ICA Members
Back to ICA Online Directory

Hanco Zwaan

Naturalis Biodiversity Center/Netherlands Gemmological Laboratory
Contact information may be available to logged in members.

Professional Bio

Gemstone, Pearls, ID Reports, Diamond Grading Reports, Practical Gemology Classes, & ATC Gem-A.

Company/Business

ICA Logo Associate Member

Business Categories
Gemological Laboratory
Sign up to stay in touch!