GIA Diamond and Diamond Grading Exam Questions with Correct Answers
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Course
Diamond grading
Institution
Diamond Grading
A consistent way to communicate diamond quality - Answer-A diamond grading system provides...
Sells to retailers - Answer-A wholesaler is someone who...
Depend on the market conditions that exist when the lists are published - Answer-Diamonds prices on wholesale price lists
Graded more tho...
GIA Diamond and Diamond Grading
Exam Questions with Correct Answers
A consistent way to communicate diamond quality - Answer-A diamond grading system
provides...
Sells to retailers - Answer-A wholesaler is someone who...
Depend on the market conditions that exist when the lists are published - Answer-
Diamonds prices on wholesale price lists
Graded more thoroughly than small, low quality ones - Answer-Large, high-quality
diamonds are...
A result of the conditions under which it formed - Answer-Diamond's supreme hardness
and durability are...
Must spend additional time and money to evaluate and develop them - Answer-Once
diamond deposits are located, mining companies...
Appraisal - Answer-An estimation of the value of an article is a(n)...
Reputable gemological laboratories - Answer-The most consistent and dependable
sources of diamond grades are...
Can buy in large quantities - Answer-Substantial price discounts are available to
retailers and jewellery manufacturers who...
Quality - Answer-A diamond's clarity and colour grades indicate its...
Mountings hide details of clarity and cut - Answer-Reputable gemological laboratories
don't grade mounted diamonds because...
Sieves - Answer-Dealers often sort melee by size using...
The world's supply of diamond rough has increased - Answer-The diamond industry has
changed dramatically in recent years because...
The rise of the cutting industry in India - Answer-The Argyle mine in Australia
contributed to...
The specific combinations of the Four Cs - Answer-Wholesale price lists are usually
organised according to...
,Growth marks - Answer-Squares or rectangles, trigons, and parallel grooves are types
of...
Octahedral planes - Answer-The crystal planes most suitable for cleaving a diamond
are the...
Dodecahedral - Answer-Which is the softest direction in diamond?
It affects the amount of weight retained after cutting - Answer-Crystal shape is an
important factor in the evaluation of rough because...
A well-formed octahedral crystal - Answer-The diamond term glassie refers to...
Mineral - Answer-A naturally occurring, inorganic substance with a characteristic
chemical composition and usually a characteristic crystal structure is known as a...
Octahedron - Answer-The habit of gem-quality diamond is the...
Isometric - Answer-Another name for the cubic crystal system is...
Relatively wide spaces between some atomic planes - Answer-In diamonds, cleavage is
caused by...
Macle - Answer-A flat, triangular twinned diamond crystal is called a...
Covalent - Answer-The strongest of all atomic bonds are called...
Crystal - Answer-Solid matter with atoms arranged in a regular, repeating pattern is
called a(n)...
Unit cell - Answer-The smallest group of atoms with a characteristic chemical
composition and the basic crystal structure of a mineral is called a(n)...
3.52 - Answer-What is the specific gravity of gem-quality diamond?
Trace elements - Answer-Atoms in a gem that aren't part of its essential chemical
composition are called...
Pattern - Answer-The relative size, arrangement, and contrast of bright and dark areas
that result from a diamond's internal and external reflections is called...
Fire - Answer-The flashes of colour you see in a polished diamond are called...
Appearance - Answer-Variations in lightning and surroundings can affect a diamond's...
A form of radiant energy - Answer-Visible light is...
,A combination of all the spectral colours - Answer-White light is actually...
Transmission - Answer-The passage of light into or through a material is called...
More it slows down light - Answer-The higher the optical density of a material, the...
Refraction - Answer-The change in speed and possible change in direction of light as it
travels from one material to another is called...
Inside the critical angle - Answer-In order to exit a diamond, light must strike an inner
surface...
Scintillation - Answer-The flashes of light and the contrasting dark areas you see when
the diamond, the light, or the observer moves are called...
Luster - Answer-The appearance of a material's surface in reflected light is called...
More light leakage from the pavilion - Answer-Grease on the pavilion of diamond results
in...
Dispersion - Answer-The difference between the RI values of specific violet and red
wavelengths of visible light for a given material is its...
Angle of reflection - Answer-The angle of incidence always equals the...
Brightness - Answer-The combined effect of all the diamond's surface and internal white
light reflections is its...
Shape - Answer-The size of a finished gem depends greatly upon the rough
diamond's...
Kerf - Answer-A notch scratched into diamond rough to prepare it for cleaving is called
a...
17 or 18 - Answer-The number of facets on a single-cut diamond is...
An old European cut - Answer-An early brilliant that has a circular girdle outline is
called...
Dop and tang - Answer-The devices that grip and hold a diamond for polishing are
known as the...
Rose cut - Answer-The cutting style with a flat bottom and a variable number of facets
that come to a peak at the top is the...
, Planner - Answer-The person who decides where to mark diamond rough for fashioning
is called the...
Laser sawing - Answer-The directional properties and structural features of a diamond
crystal do not really matter in...
Allowing for greater weight retention from rough - Answer-The rotary saw contributed to
the diamond-cutting industry by...
Growth marks - Answer-To help determine crystal directions, diamond cutters look for...
Maximise profits - Answer-A diamond cutter's main objective are to produce an
attractive finished diamond and...
Brillianteering - Answer-The process of polishing the star and upper and lower half
facets is called...
Polishing a window to view the interior - Answer-When the rough has a frosty or non-
transparent surface surface, the cutter can look for inclusions by...
Scaife - Answer-The cast-iron disc on which a diamond is polished is called a...
Blocker - Answer-In the cutting sequence, the crown and pavilion mains are polished by
the...
Growth marks - Answer-Trigons are...
Darkfield illumination - Answer-Inclusions are easier to see using...
Knot - Answer-And included diamond crystal that extends to the surface of a fashioned
diamond is called a...
Abrasions - Answer-A "paper-worn" diamond is one that has...
Bruise - Answer-A surface indention with tiny root-like feathers penetrating the stone is
called a...
Chip - Answer-Which of the following is classified as an inclusion?
Natural - Answer-An example of a blemish is a...
An included crystal - Answer-A solid mineral body enclosed within a diamond (or other
gem) is...
Feathers - Answer-The inclusion called bearding consists of tiny...
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