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AGS
A
merican
G
em
S
ociety
L
aboratories. This laboratory was founded in 1934 and is recognized as one of the most respected authorities for grading diamonds. The American Gem Society has its own rating scale for a diamond’s cut. This numbering system ranges from 0 to 10.
Abrasion (Abr)
A series of minute
nicks
along the facet junctions of a diamond that give the edges a white or fuzzy appearance.
Alloy
A mixture of two metals. White metal alloys are added to gold to give
white gold
its color and sheen.
Asscher Cut
An octagonal
step-cut
diamond, which is sometimes referred to as a square emerald cut.
Appraisal
An appraisal is a written estimate of the approximate retail replacement value of diamond jewelry, which may be used for insurance purposes.
Aubergine
One of the three colors associated with Tahitian cultured pearls, aubergine pearls are a dark, grayish purple.