Gemological Institute of America (GIA) is a well respected independent, international grading laboratory responsible for the grading of diamonds. Many of the world’s most precious diamonds and gemstones are graded by the GIA. 

The narrow band around the widest part of the diamond or gemstone. The girdle can be faceted, polished or unpolished.

Girdle thickness
The measurement describing the percentage of the diamond's average girdle diameter. The descriptions of girdle thickness range from extremely thin, thin, medium, slightly thick, thick and extremely thick.

Grading report
See Diamond grading report.

A precious metal widely used in the jewellery trade. Gold has the longest and most storied history of all precious metals. Gold in jewellery terms is expressed in karats (abbreviated in K or KT). Pure gold is 24K and is very soft in nature. 18K gold contains 75% gold and 25% other metals to make it stronger and more suitable for every day wear in jewellery.

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