The GIA Diamond Grading report means the diamond is evaluated, measured, and scrutinised using trained eyes and optical magnification.
A completed certificate includes an analysis of these characteristics:
- Shape and Cutting Style.
- Measurement - dimensions in millimeters.
- Carat Weight - weight of a diamond to the nearest hundredth of a carat.
- Colour Grade - assesses the absence of colour in a diamond.
- Clarity Grade - determined under 10x magnification.
- Cut Grade - determined by face-up appearance, design and craftsmanship.
- Finish - grades that represent a diamond’s surface and facet placement.
- Polish - rating the smoothness of the surface.
- Symmetry - the shape, alignment and placement of a diamonds facets in relation to one another.
- Fluorescence - colour, and strength of colour when viewed under UV light.
- Comments - any additional diamond characteristics.
- Clarity Plot - a map of the approximate size, type, and position of inclusions.
- Proportion Diagram - A map of the diamond’s actual proportions.
The GIA’s reputation, and an accompanying GIA Diamond Grading Report, ensures that a decision to invest in a diamond can be made with peace of mind. The foremost experts in the world have assessed the gem on an objective basis and documented its characteristics, allowing purchasing confidence. Most diamonds over 0.5 carat are certified by the Gemological Institute of America and come with a unique certification code and a GIA Diamond Grading Report.