GIA DIAMOND GRADING QUIZ 1 with
Solutions
The more an inclusion differs in color from its host diamond - Answer-the more obvious it is
A feather that reaches a bezel surface as well as the surface of the pavilion main directly under the bezel
- Answer-should be plotted on both the crown and pavilion diagrams
In a stone with these clarity characteristics, which would probably be the grade-setting characterisitc? -
Answer-feather
Which would disqualify a stone from being IF - Answer-Pinpoint
Diamonds with minute inclusions at 10x are - Answer-VVS1 or VVS2
A reflector is the result of the inclusions - Answer-position
A round brilliant VVS diamond could have - Answer-a small pinpoint under a lower girdle facet
, VS1 and VS2 stones would be expected to have - Answer-minute inclusons
One factor used to determine the clarity grade of a diamond is an inclusions - Answer-location
A stone with only a few extra facets on its pavilion that can't be seen face up should be graded -
Answer-IF
Inclusions are most visible when located - Answer-directly under the table
Squares or rectangles, trigons, and parallel grooves are types of - Answer-growth marks
The crystal planes most suitable for cleaving a diamond are the - Answer-octahedral planes
Which is the softest crystal direction in a diamond - Answer-Dodecahedral
Crystal shape is important in evaluating rough because - Answer-it affects the amount of weight
retained after cutting
The diamond term glassy refers to - Answer-a well-formed octahedral crystal
Naturally occurring, inorganic substance with a characteristic chemical composition and usually a
characteristic crystal structure is known as a - Answer-mineral
The habit of gem quality diamond is the - Answer-octahedron
Another name for the cubical crystal system is - Answer-isometric
Solutions
The more an inclusion differs in color from its host diamond - Answer-the more obvious it is
A feather that reaches a bezel surface as well as the surface of the pavilion main directly under the bezel
- Answer-should be plotted on both the crown and pavilion diagrams
In a stone with these clarity characteristics, which would probably be the grade-setting characterisitc? -
Answer-feather
Which would disqualify a stone from being IF - Answer-Pinpoint
Diamonds with minute inclusions at 10x are - Answer-VVS1 or VVS2
A reflector is the result of the inclusions - Answer-position
A round brilliant VVS diamond could have - Answer-a small pinpoint under a lower girdle facet
, VS1 and VS2 stones would be expected to have - Answer-minute inclusons
One factor used to determine the clarity grade of a diamond is an inclusions - Answer-location
A stone with only a few extra facets on its pavilion that can't be seen face up should be graded -
Answer-IF
Inclusions are most visible when located - Answer-directly under the table
Squares or rectangles, trigons, and parallel grooves are types of - Answer-growth marks
The crystal planes most suitable for cleaving a diamond are the - Answer-octahedral planes
Which is the softest crystal direction in a diamond - Answer-Dodecahedral
Crystal shape is important in evaluating rough because - Answer-it affects the amount of weight
retained after cutting
The diamond term glassy refers to - Answer-a well-formed octahedral crystal
Naturally occurring, inorganic substance with a characteristic chemical composition and usually a
characteristic crystal structure is known as a - Answer-mineral
The habit of gem quality diamond is the - Answer-octahedron
Another name for the cubical crystal system is - Answer-isometric
