GIA Diamond Essentials Final Exam 2018 Questions & Answers(RATED A+)
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GIA Diamond Essentials
Institution
GIA Diamond Essentials
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 - ANSWERAny gemstone shape or cu...
GIA Diamond Essentials Final Exam
2018 Questions & Answers(RATED A+)
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 - ANSWERAny gemstone shape or cutting style other than a standard
round brilliant
Fire - ANSWERThe flashes of colour you see in a polished diamond
Four Cs - ANSWERFour value factors (clarity, colour, cut, and carat weight) that
describe the quality of a finished gem and also relates primarily to its value
Girdle - ANSWERThe 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 - ANSWERHow well a gemstone resists scratches and abrasion
Inclusion - ANSWERClarity characteristic totally enclosed in a polished gemstone or
extending into it from the surface
Karat - ANSWERA unit for the fineness of gold, abbreviated "K" or "Kt"
Metric carat - ANSWERThe international unit of measure for gram weight. One carat
equals one-fifth of a gram (0.200g)
Mixed cut - ANSWERCut that combines brilliant-cut and step-cut styles
Mohs scale - ANSWERRanking of the relative hardness of 10 minerals
Pavilion - ANSWERLower part of a faceted gem below the girdle
Point - ANSWEROne hundredth of a carat (0.01ct)
Scintillation - ANSWERThe flashes of light and the contrasting dark areas you see
when the diamond, the light, or the observer moves
Simulant - ANSWERA natural or manmade material that resembles a gem (also
called imitation)
Single cut - ANSWERA round stone with 17 or 18 facets
, Stability - ANSWERHow well a diamond resists chemicals and temperature changes
Standard round brilliant - ANSWERA round brilliant-cut stone with 57 or 58 facets.
Often called a full cut
Step cut - ANSWERA cutting style that features long narrow facets in rows parallel to
the girdle on both the crown and pavilion
Synthetic gem - ANSWERA manmade gem with essentially the same chemical
composition, crystal structure, and properties as a natural gem
Thermal shock - ANSWERDamages caused by sudden, extreme temperature
changes
Toughness - ANSWERHow well a gemstone resists breaking and chipping
Value factors - ANSWERFeatures used to judge the quality and value of all
gemstones
Carbon - ANSWERThe mineral diamonds are primarily composed of
Crown, pavilion, and girdle - ANSWERThe three major parts of a diamond
A ton of rock - ANSWERWhat a mine must process to recover a half carat of
diamond
Brilliant cut - ANSWERCutting style with triangular or kite-shaped facets that radiate
from the center toward the girdle
Blemishes - ANSWERClarity characteristics confined to the surface of a polished
diamond
Nearly colourless to a very light yellow, light brown, or light grey - ANSWERMost
diamonds used in jewellery
Diamond - ANSWERMost durable gemstone. Also expensive due to rarity and how
costly it is to mine
Branded cut - ANSWERCutting style that's developed, named and promoted by a
specific manufacturer
Brightness - ANSWERThe effect of all the diamond's internal and external reflections
of white light
Clarity characteristics - ANSWERThe collective term for inclusions and blemishes
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