GIA Diamond Essentials Final Exam
Crown - answerTop part of the gem above the girdle
Culet - answerSmall facet at the bottom of a finished gem
Durability - answerA gemstone's ability to withstand wear, heat, and chemicals
Facet - answerA flat, polished surface on a finished gem
Fancy cut - ans...
Crown - answer✔✔Top part of the gem above the girdle
Culet - answer✔✔Small facet at the bottom of a finished gem
Durability - answer✔✔A gemstone's ability to withstand wear, heat, and chemicals
Facet - answer✔✔A flat, polished surface on a finished gem
Fancy cut - answer✔✔Any gemstone shape or cutting style other than a standard round brilliant
Fire - answer✔✔The flashes of colour you see in a polished diamond
Four Cs - answer✔✔Four value factors (clarity, colour, cut, and carat weight) that describe the
quality of a finished gem and also relates primarily to its value
Girdle - answer✔✔The narrow section of a finished gem that forms the boundary between the
crown and the pavilion and functions as the gem's setting edge
Hardness - answer✔✔How well a gemstone resists scratches and abrasion
Inclusion - answer✔✔Clarity characteristic totally enclosed in a polished gemstone or extending
into it from the surface
Karat - answer✔✔A unit for the fineness of gold, abbreviated "K" or "Kt"
Metric carat - answer✔✔The international unit of measure for gram weight. One carat equals
one-fifth of a gram (0.200g)
Mixed cut - answer✔✔Cut that combines brilliant-cut and step-cut styles
Mohs scale - answer✔✔Ranking of the relative hardness of 10 minerals
Pavilion - answer✔✔Lower part of a faceted gem below the girdle
Point - answer✔✔One hundredth of a carat (0.01ct)
Scintillation - answer✔✔The flashes of light and the contrasting dark areas you see when the
diamond, the light, or the observer moves
Branded cut - answer✔✔Cutting style that's developed, named and promoted by a specific
manufacturer
Brightness - answer✔✔The effect of all the diamond's internal and external reflections of white
light
Clarity characteristics - answer✔✔The collective term for inclusions and blemishes
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