Testing
Natural vs Synthetic Verification
Determining whether a gemstone was created by nature or grown in a laboratory is becoming increasingly difficult and requires special testing. WGI gemologists use advanced equipment to test stones and establish whether they are natural or synthetic.
What the service provides
- A clear natural or laboratory-grown determination
- Screening of loose and mounted stones
- Confidence before buying or selling
The process
- 01Stones are screened with specialised equipment
- 02Growth structures and features are studied under magnification
- 03Spectroscopic analysis is used where required
- 04Results are documented in the report
What a report may contain
- Natural or laboratory-grown determination
- Description of the stones tested
Who it is for
- Buyers of diamonds and jewellery
- Dealers and manufacturers screening parcels
- Retailers
Report contents depend on the item submitted. WGI describes the characteristics found; results cannot be guaranteed in advance.
World Gemological Institute
Discover the Confidence of WGI.
Whether you are exploring lab-grown diamonds, seeking professional gemological services or learning more about your jewellery, discover the expertise behind WGI.