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GIA DIAMOND AND DIAMOND GRADING FINAL EXAM 2025/2026 ACTUAL EXAM
COMPLETE 200 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) // ALREADY GRADED A+ //
What is a term that describes tone? - ANSWER - Degree of darkness or lightness
What color becomes more prominent as cool hues become less saturated? - ANSWER -
Gray
What term falls on the GIA D-to-Z color scale? - ANSWER - Light
What material are master stones? - ANSWER - Diamonds
What position are colored diamonds color graded in? - ANSWER - Face-up
Where is the focus when color grading a heavily included diamond? - ANSWER - The least
included area
How do you measure a diamond's depth? - ANSWER - Millimeter gauge OR as a percentage
of its average diameter
How many star facet lengths on a round brilliant diamond are estimated before averaging?
- ANSWER - 8
What weight retention method can change the balance of the diamond's face-up pattern? -
ANSWER - Painting
What facet forms the pavilion angle when it meets the girdle plane? - ANSWER - Pavilion
What pavilion depth percentage might reflect the girdle face-up through the table? -
ANSWER - 37%
Why do diamonds with thick girdles offer less value? - ANSWER - Paying for more weight
than you see
What might be found in a diamond with misalignment (Aln)? - ANSWER - Misshapen facets
How do shallow pavilion angles affect appearance? - ANSWER - Make it look foggy
What style describes a diamond that has both brilliant-cut and step-cut facets? - ANSWER
- Mixed cut
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What is the area between the head and belly of an oval? - ANSWER - Shoulders
What is used for total depth percentage calculation in fancy shapes? - ANSWER - Width of
stone (instead of average girdle diameter)
Why is there no single cut grading standard for fancy cuts? - ANSWER - Too many
variations
What style helps avoid point breakage in fancy cuts? - ANSWER - French tip
What is the length-to-width ratio for a fancy cut 4.00mm long and 2.00mm wide? -
ANSWER - 2:1
How do diamond professionals estimate the weight of mounted diamonds? - ANSWER -
Mathematical formulas
What do appraisers assign to larger mounted diamonds when color grading? - ANSWER -
Single grade
What term describes a diamond whose clarity can become VVS after repolishing? -
ANSWER - Improvable
What is a good case for recutting? - ANSWER - Remove color zoning (rarely used) OR
increase color
A diamond buying and selling club (they have them in trading centers) - ANSWER - Bourse
A type of rock that diamonds form in
• igneous rock (formed from a molten state)
• most diamond form in this rock
• has consistent release of carbon - ANSWER - Peridotite
A type of rock that diamonds for in
• metamorphic rock (rocks that have been altered by heat and pressure)
• does not have a consistent release of carbon - ANSWER - Eclogite
How far beneath the earth do diamonds form? - ANSWER - 90-140 miles (140-220 km)
A horizontal tunnel drilled through a diamond pipe - ANSWER - Drift
GIA DIAMOND AND DIAMOND GRADING FINAL EXAM 2025/2026 ACTUAL EXAM
COMPLETE 200 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) // ALREADY GRADED A+ //
What is a term that describes tone? - ANSWER - Degree of darkness or lightness
What color becomes more prominent as cool hues become less saturated? - ANSWER -
Gray
What term falls on the GIA D-to-Z color scale? - ANSWER - Light
What material are master stones? - ANSWER - Diamonds
What position are colored diamonds color graded in? - ANSWER - Face-up
Where is the focus when color grading a heavily included diamond? - ANSWER - The least
included area
How do you measure a diamond's depth? - ANSWER - Millimeter gauge OR as a percentage
of its average diameter
How many star facet lengths on a round brilliant diamond are estimated before averaging?
- ANSWER - 8
What weight retention method can change the balance of the diamond's face-up pattern? -
ANSWER - Painting
What facet forms the pavilion angle when it meets the girdle plane? - ANSWER - Pavilion
What pavilion depth percentage might reflect the girdle face-up through the table? -
ANSWER - 37%
Why do diamonds with thick girdles offer less value? - ANSWER - Paying for more weight
than you see
What might be found in a diamond with misalignment (Aln)? - ANSWER - Misshapen facets
How do shallow pavilion angles affect appearance? - ANSWER - Make it look foggy
What style describes a diamond that has both brilliant-cut and step-cut facets? - ANSWER
- Mixed cut
, 2 of 14
What is the area between the head and belly of an oval? - ANSWER - Shoulders
What is used for total depth percentage calculation in fancy shapes? - ANSWER - Width of
stone (instead of average girdle diameter)
Why is there no single cut grading standard for fancy cuts? - ANSWER - Too many
variations
What style helps avoid point breakage in fancy cuts? - ANSWER - French tip
What is the length-to-width ratio for a fancy cut 4.00mm long and 2.00mm wide? -
ANSWER - 2:1
How do diamond professionals estimate the weight of mounted diamonds? - ANSWER -
Mathematical formulas
What do appraisers assign to larger mounted diamonds when color grading? - ANSWER -
Single grade
What term describes a diamond whose clarity can become VVS after repolishing? -
ANSWER - Improvable
What is a good case for recutting? - ANSWER - Remove color zoning (rarely used) OR
increase color
A diamond buying and selling club (they have them in trading centers) - ANSWER - Bourse
A type of rock that diamonds form in
• igneous rock (formed from a molten state)
• most diamond form in this rock
• has consistent release of carbon - ANSWER - Peridotite
A type of rock that diamonds for in
• metamorphic rock (rocks that have been altered by heat and pressure)
• does not have a consistent release of carbon - ANSWER - Eclogite
How far beneath the earth do diamonds form? - ANSWER - 90-140 miles (140-220 km)
A horizontal tunnel drilled through a diamond pipe - ANSWER - Drift
