Diamond cut or shaped into a rectangle with sharp corners, and rows or steps of elongated facets running parallel to the girdle on both the crown and the pavilion.
Baguette Cut
Asscher Cut
Appraisal
Written estimate of the approximate retail replacement value of a diamond or piece of diamond jewellery. An appraisal is not a diamond certificate or diamond grading report.
Annealing
Treatment to artificially enhance the colour of a diamond with a slow-heating process. Irradiated diamonds are usually annealed to further modify or enhance their colour.
Adamas
Archaic Greek word from which the word ‘diamond’ is derived. Adamas means ‘indestructible’.
Abrasion
Type of blemish that looks like a bruise or scratch on the surface of a diamond. Abrasions can affect the polish grade of a diamond.
Abraded Facet Edge
The sharp edges where diamond facets meet can become damaged and worn away with wear. An abraded facet edge can look “fuzzy” under magnification, and affect the polish grade of a diamond.
Abraded Culet
The sharp point at the bottom of the diamond can become damaged and worn away with wear. An abraded culet can look “fuzzy” under magnification, and affect the polish grade of a diamond.