Skip to content
Understanding Evaluation & Valuation
Knowledge Centre · Value

Understanding Evaluation & Valuation

The difference between grading an item and estimating its value.

Knowledge Centre

Grading describes, valuation estimates

A grading report describes an item's characteristics. A valuation is an estimate of value at a point in time and for a particular purpose, such as insurance or resale, and depends on market conditions.

Before you buy

WGI's Verbal Pre-Grade / Evaluation lets you have a piece examined before purchase, with our team explaining its quality so you understand what you are buying.

Price evaluation on reports

A WGI Jewellery Report can include a price evaluation on request.

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.