Diamond & Diamond Grading Exam
______ of diamonds depend on the market conditions that exist when the lists are published -
ANS - the listed wholesale prices
\A bourse is a(n)... - ANS - diamond buying and selling club
\A city, region or country with a large number of gemstone manufacturers is called a... - ANS -
cutting center
\A diamond grading system provides... - ANS - a consistent way to communicate diamond
quality
\ Diamond's clarity and color grades indicate its... - ANS - quality
\a diamond face up pattern reveals... - ANS - almost all of the cutters fashioning choices
\ Diamond specific formation conditions are directly responsible for it's ________ - ANS - it's
hardness and durability.
\a fashioned diamond optical display is meant to be seen... - ANS - face up and in motion
\a mining company must consider potential mines... - ANS - location, climate and political
conditions
\A wholesaler is someone who... - ANS - sells to retailers.
\Abrasion (Abr) - ANS - A series of minute nicks along the facet junctions of a fashioned
diamond; gives the edges a white or fuzzy appearance. (Assignment 10)
\Abundant South African diamond sources appeared in XXXX, just when diamond demand
broadened. - ANS - The late 1800's
\Adamantine luster - ANS - The highest degree of luster possible in a transparent material.
(Assignment 8)
\admantine luster - ANS - the highest degree of luster possible in a transparent material
\African diamonds are recovered from... - ANS - alluvial, pipe and marine deposites
\Aggregate - ANS - A solid mass of individual, randomly oriented crystals, intergrown or held
together by a natural binding agent. (Assignment 7)
\agrregate - ANS - a solid mass of individial, randomly oriented crystals, intergrown or held
together by a natural bind agent
\Alluvial deposit - ANS - A deposit where gems are eroded from their source rock, then
transported away from the source and further concentrated. (Assignment 5)
\An estimation of the value of an article is a(n)... - ANS - appraisal
\Angle of incidence - ANS - The angle at which a ray of light strikes a surface, measured from
the normal. (Assignment 8)
\angle of incidence - ANS - the angle at which a ray of light strikes a surface, mesasured from
the normal
\angle of reflection - ANS - the angle between the mornal and a reflected ray of light
\Angle of reflection - ANS - The angle between the normal and a reflected ray of light.
(Assignment 8)
\Annealing - ANS - Using heat to stabilize irradiated color in gemstones. (Assignment 12)
\another name for the cubic crystal system is... - ANS - isometric
,\Appraisal - ANS - An estimation of the value of an article, usually for insurance purposes.
(Assignment 1)
\Are diamonds more concentrated in primary deposits or marine deposits? - ANS - Primary
deposits!
\Argyle mine is famous for... - ANS - producing rare and valuable pink diamonds
\atoms in a gem that arent part of its essential chemical composition are called... - ANS - trace
elements
\Average girdle diameter - ANS - The result achieved by adding the smallest and largest girdle
measurements of a round brilliant and dividing by two. (Assignment 14)
\Bast - ANS - Frosted rough diamond. "Bark" in Dutch. (Assignment 9)
\Bearded Girdle (BG) - ANS - Very small feathers that extend from the girdle surface into the
stone; can result from the cutting process. (Assignment 10)
\Because the Australians believed the CSO's marketing favored large stones over smaller ones,
they... - ANS - aggressively promoted jewelry made with their own tiny gems
\Before the discovery of South Africa's diamond deposits, the world's two major producers
were... - ANS - India and Brazil
\Belly - ANS - The slightly curving center of the long side of a pear, marquise, heart, or oval.
(Assignment 16)
\Beneficiation - ANS - A commitment to reserve a portion of the resources derived from any
country for the economic development of that country. (Assignment 3)
\Beneficiation helps countries exercise greater control over... - ANS - their natural mineral
resources
\Best Practices Principles (BPP) - ANS - De Beers' formalized commitment of itself and its
sightholders to the highest ethical standards. (Assignment 3)
\Blemish - ANS - Clarity characteristic that's confined to the surface of a polished gemstone.
(Assignment 10)
\Block caving - ANS - Underground mining that involves building a concrete-lined tunnel under
an ore deposit, then collecting the ore through openings in the liner. (Assignment 6)
\Blocking - ANS - Placing the first 17 or 18 facets on a diamond. (Assignment 9)
\Bow-tie - ANS - A dark area across the center of an elongated brilliant cut. (Assignment 16)
\Brick-and-mortar retailer - ANS - A traditional store consisting of walls and a fixed location.
(Assignment 3)
\Brightness - ANS - The effect of all the diamond's internal and external reflections of white light.
(Assignment 8)
\Brilliant cut - ANS - A cutting style in which triangular and kite-shaped facets radiate from a
gem's center toward its girdle. (Assignment 16)
\Brillianteering - ANS - Placement and polishing of the star and upper and lower girdle facets.
(Assignment 9)
\Bruise (Br) - ANS - A tiny area of impact accompanied by very small, root-like feathers visible at
10X magnification; typically occurs at a facet junction. (Assignment 10)
\Bruting - ANS - Forming the basic face-up outline of a diamond to prepare it for faceting.
(Assignment 9)
\Bulk sampling - ANS - Large-scale character sampling. (Assignment 5)
, \Burn Marks (Brn) - ANS - Hazy surface areas that result from excessive heat or from uneven
polishing caused by structural irregularities; also called polish marks or burned facets.
(Assignment 10)
\Businesses that sell to consumers via TV or computer are called... - ANS - Electronic retailers
\By 2004, more than 90% of manufacturing for the diamond market was done in... - ANS - India
\Cavity (Cv) - ANS - An angular opening created when part of a feather breaks away.
(Assignment 10)
\Cecil Rhodes' main competitor in his early attempts to control diamond production was... - ANS
- Barney Barnato.
\Central Selling Organisation (CSO) - ANS - An agency designed to purchase, sort, evaluate,
and sell rough diamonds. (Assignment 2)
\Chambering and block caving are methods used in... - ANS - mining diamond pipes
\Character sampling - ANS - Testing for the size, shape, clarity, and color of the diamonds in a
deposit. (Assignment 5)
\Characteristic color - ANS - The basic color of a fancy-colored diamond. (Assignment 13)
\Chemical vapor deposition (CVD) - ANS - An industrial process adapted to allow growth of
synthetic diamond from carbon-rich gas in thin layers onto a silicon or diamond surface.
(Assignment 19)
\Chip (Ch) - ANS - A shallow opening caused by damage to the stone's surface; typically occurs
at a girdle edge, facet junction, or culet. (Assignment 10)
\Clarity characteristic - ANS - Internal or external feature of a gemstone that helps determine its
quality and establish its identity. (Assignment 10)
\Cleavage (Cl) - ANS - Large, severe, straight break along a plane of atomic weakness;
considered an inclusion. (Assignment 10)
\Cleavage plane - ANS - Plane parallel to a possible crystal face, where a diamond can split
cleanly when struck. (Assignment 7)
\Cleaver - ANS - A person who cleaves, or splits, a diamond along a cleavage plane. The
cleaver might also be responsible for planning the fashioning of a polished gem. (Assignment 9)
\Cleaving - ANS - Dividing a diamond into two or more pieces along a cleavage plane.
(Assignment 9)
\clevage plane - ANS - plane parallel to a possible crystal face; where a diamond can split
cleanly when struck
\Cloud (Cld) - ANS - Many tightly grouped pinpoints that might be too small to distinguish
individually at 10X but together have a hazy appearance. (Assignment 10)
\Color center - ANS - Structural defect that influences an object's absorption of light and can
cause its color. (Assignment 12)
\Conflict diamonds - ANS - Diamonds used to finance violence and terror. (Assignment 3)
\Consignment - ANS - A selection of goods loaned to a dealer by another wholesaler or
manufacturer. (Assignment 20)
\Core - ANS - Earth's innermost layer. (Assignment 4)
\Covalent bond - ANS - A chemical bond formed by two atoms sharing electrons. (Assignment
7)
\Craftsmanship - ANS - The care that goes into the fashioning of a polished diamond, as
confirmed by its finish. (Assignment 15)
______ of diamonds depend on the market conditions that exist when the lists are published -
ANS - the listed wholesale prices
\A bourse is a(n)... - ANS - diamond buying and selling club
\A city, region or country with a large number of gemstone manufacturers is called a... - ANS -
cutting center
\A diamond grading system provides... - ANS - a consistent way to communicate diamond
quality
\ Diamond's clarity and color grades indicate its... - ANS - quality
\a diamond face up pattern reveals... - ANS - almost all of the cutters fashioning choices
\ Diamond specific formation conditions are directly responsible for it's ________ - ANS - it's
hardness and durability.
\a fashioned diamond optical display is meant to be seen... - ANS - face up and in motion
\a mining company must consider potential mines... - ANS - location, climate and political
conditions
\A wholesaler is someone who... - ANS - sells to retailers.
\Abrasion (Abr) - ANS - A series of minute nicks along the facet junctions of a fashioned
diamond; gives the edges a white or fuzzy appearance. (Assignment 10)
\Abundant South African diamond sources appeared in XXXX, just when diamond demand
broadened. - ANS - The late 1800's
\Adamantine luster - ANS - The highest degree of luster possible in a transparent material.
(Assignment 8)
\admantine luster - ANS - the highest degree of luster possible in a transparent material
\African diamonds are recovered from... - ANS - alluvial, pipe and marine deposites
\Aggregate - ANS - A solid mass of individual, randomly oriented crystals, intergrown or held
together by a natural binding agent. (Assignment 7)
\agrregate - ANS - a solid mass of individial, randomly oriented crystals, intergrown or held
together by a natural bind agent
\Alluvial deposit - ANS - A deposit where gems are eroded from their source rock, then
transported away from the source and further concentrated. (Assignment 5)
\An estimation of the value of an article is a(n)... - ANS - appraisal
\Angle of incidence - ANS - The angle at which a ray of light strikes a surface, measured from
the normal. (Assignment 8)
\angle of incidence - ANS - the angle at which a ray of light strikes a surface, mesasured from
the normal
\angle of reflection - ANS - the angle between the mornal and a reflected ray of light
\Angle of reflection - ANS - The angle between the normal and a reflected ray of light.
(Assignment 8)
\Annealing - ANS - Using heat to stabilize irradiated color in gemstones. (Assignment 12)
\another name for the cubic crystal system is... - ANS - isometric
,\Appraisal - ANS - An estimation of the value of an article, usually for insurance purposes.
(Assignment 1)
\Are diamonds more concentrated in primary deposits or marine deposits? - ANS - Primary
deposits!
\Argyle mine is famous for... - ANS - producing rare and valuable pink diamonds
\atoms in a gem that arent part of its essential chemical composition are called... - ANS - trace
elements
\Average girdle diameter - ANS - The result achieved by adding the smallest and largest girdle
measurements of a round brilliant and dividing by two. (Assignment 14)
\Bast - ANS - Frosted rough diamond. "Bark" in Dutch. (Assignment 9)
\Bearded Girdle (BG) - ANS - Very small feathers that extend from the girdle surface into the
stone; can result from the cutting process. (Assignment 10)
\Because the Australians believed the CSO's marketing favored large stones over smaller ones,
they... - ANS - aggressively promoted jewelry made with their own tiny gems
\Before the discovery of South Africa's diamond deposits, the world's two major producers
were... - ANS - India and Brazil
\Belly - ANS - The slightly curving center of the long side of a pear, marquise, heart, or oval.
(Assignment 16)
\Beneficiation - ANS - A commitment to reserve a portion of the resources derived from any
country for the economic development of that country. (Assignment 3)
\Beneficiation helps countries exercise greater control over... - ANS - their natural mineral
resources
\Best Practices Principles (BPP) - ANS - De Beers' formalized commitment of itself and its
sightholders to the highest ethical standards. (Assignment 3)
\Blemish - ANS - Clarity characteristic that's confined to the surface of a polished gemstone.
(Assignment 10)
\Block caving - ANS - Underground mining that involves building a concrete-lined tunnel under
an ore deposit, then collecting the ore through openings in the liner. (Assignment 6)
\Blocking - ANS - Placing the first 17 or 18 facets on a diamond. (Assignment 9)
\Bow-tie - ANS - A dark area across the center of an elongated brilliant cut. (Assignment 16)
\Brick-and-mortar retailer - ANS - A traditional store consisting of walls and a fixed location.
(Assignment 3)
\Brightness - ANS - The effect of all the diamond's internal and external reflections of white light.
(Assignment 8)
\Brilliant cut - ANS - A cutting style in which triangular and kite-shaped facets radiate from a
gem's center toward its girdle. (Assignment 16)
\Brillianteering - ANS - Placement and polishing of the star and upper and lower girdle facets.
(Assignment 9)
\Bruise (Br) - ANS - A tiny area of impact accompanied by very small, root-like feathers visible at
10X magnification; typically occurs at a facet junction. (Assignment 10)
\Bruting - ANS - Forming the basic face-up outline of a diamond to prepare it for faceting.
(Assignment 9)
\Bulk sampling - ANS - Large-scale character sampling. (Assignment 5)
, \Burn Marks (Brn) - ANS - Hazy surface areas that result from excessive heat or from uneven
polishing caused by structural irregularities; also called polish marks or burned facets.
(Assignment 10)
\Businesses that sell to consumers via TV or computer are called... - ANS - Electronic retailers
\By 2004, more than 90% of manufacturing for the diamond market was done in... - ANS - India
\Cavity (Cv) - ANS - An angular opening created when part of a feather breaks away.
(Assignment 10)
\Cecil Rhodes' main competitor in his early attempts to control diamond production was... - ANS
- Barney Barnato.
\Central Selling Organisation (CSO) - ANS - An agency designed to purchase, sort, evaluate,
and sell rough diamonds. (Assignment 2)
\Chambering and block caving are methods used in... - ANS - mining diamond pipes
\Character sampling - ANS - Testing for the size, shape, clarity, and color of the diamonds in a
deposit. (Assignment 5)
\Characteristic color - ANS - The basic color of a fancy-colored diamond. (Assignment 13)
\Chemical vapor deposition (CVD) - ANS - An industrial process adapted to allow growth of
synthetic diamond from carbon-rich gas in thin layers onto a silicon or diamond surface.
(Assignment 19)
\Chip (Ch) - ANS - A shallow opening caused by damage to the stone's surface; typically occurs
at a girdle edge, facet junction, or culet. (Assignment 10)
\Clarity characteristic - ANS - Internal or external feature of a gemstone that helps determine its
quality and establish its identity. (Assignment 10)
\Cleavage (Cl) - ANS - Large, severe, straight break along a plane of atomic weakness;
considered an inclusion. (Assignment 10)
\Cleavage plane - ANS - Plane parallel to a possible crystal face, where a diamond can split
cleanly when struck. (Assignment 7)
\Cleaver - ANS - A person who cleaves, or splits, a diamond along a cleavage plane. The
cleaver might also be responsible for planning the fashioning of a polished gem. (Assignment 9)
\Cleaving - ANS - Dividing a diamond into two or more pieces along a cleavage plane.
(Assignment 9)
\clevage plane - ANS - plane parallel to a possible crystal face; where a diamond can split
cleanly when struck
\Cloud (Cld) - ANS - Many tightly grouped pinpoints that might be too small to distinguish
individually at 10X but together have a hazy appearance. (Assignment 10)
\Color center - ANS - Structural defect that influences an object's absorption of light and can
cause its color. (Assignment 12)
\Conflict diamonds - ANS - Diamonds used to finance violence and terror. (Assignment 3)
\Consignment - ANS - A selection of goods loaned to a dealer by another wholesaler or
manufacturer. (Assignment 20)
\Core - ANS - Earth's innermost layer. (Assignment 4)
\Covalent bond - ANS - A chemical bond formed by two atoms sharing electrons. (Assignment
7)
\Craftsmanship - ANS - The care that goes into the fashioning of a polished diamond, as
confirmed by its finish. (Assignment 15)
