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GIA Diamond Essentials Assignment 4 Questions and Correct Answers 2024.
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GIA Diamond Essentials Assignment 4 Questions and Correct Answers 2024. proportions the angles and relative measurements of a polished gem, and the relationships between them finish The quality of the polish and precision of the cut of a fashioned gemstone make the qualities of a faceted di...

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  • March 29, 2024
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  • 2023/2024
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GIA Diamond Essentials Assignment 4
Questions and Correct Answers 2024.
proportions
the angles and relative measurements of a polished gem, and the relationships between
them
finish
The quality of the polish and precision of the cut of a fashioned gemstone
make
the qualities of a faceted diamond's proportions and finish.
brilliance
when light reflects off the surface, show a flash of white light; part of diamond's
brightness
Refraction
The change in speed and direction of light when it passes from one kind of material to
another, helps to create a diamond's dazzling light display.
refraction index
a measure of the change in the speed and direction of light when it passes from one
kind of material to another.
Dispersion 色散
The separation of white light into a spectrum of colors
fire
is the result of dispersion (part of the lights leave the diamond), which is the separation
of white light into its spectral colors.
scintillation
a flash or sparkle with flashes of white and spectral-colored light.
modern diamond cutting steps
cleaving or sawing (sometimes both); bruting; polishing
Bruting
Forming the basic face-up outline of a round or rounded-shape diamond to prepare it for
faceting; traditionally involves forcing one diamond against another.
A diamonds basic proportions include
Girdle outline
table size
crown angle
girdle thickness
pavilion depth percentage
total depth percentage
cutlet size
length-to-width ratio (fancy shapes)
benefits of beveled corners
visual appeal - better dynamic than a plain rectangle; practical - provide a secured
setting area
shoulder
one of the two sides adjacent to the rounded end of a pear or oval shape.

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