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GIA DIAMONDS AND DIAMOND GRADING
FINAL EXAM 2 NEWEST 2025 ACTUAL EXAM
COMPLETE 300 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
What diamond type can be created by the HPHT method?
- ANSWER-Type 1b
What diamonds have strain pattern and intensity similar to natural diamonds? - ANSWER-CVD lab-grown diamonds
When should the origin of a lab-grown diamond be disclosed? - ANSWER-At every step
What diamond clarity treatment expands inclusions? - ANSWER-Internal laser drilling
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What diamond color treatment further modifies color by allowing vacancies and trace elements to diffuse post- irradiation? - ANSWER-Annealing
What describes the formation of graphite around a diamond's mineral inclusions and feathers? - ANSWER- Graphitization
What diamond clarity treatment relies on similar refractive index (RI) values? - ANSWER-Fracture filling
How can HPHT treatment alter a diamond's color? - ANSWER-HPHT treatment can move and rearrange defects in a diamonds crystal lattice
What feature can a colorless diamond and a simulant have in common? - ANSWER-Transparent
What can help rapidly identify a strontium titanate doublet? - ANSWER-Fire
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What is a benefit of simulants? - ANSWER-Less expensive
What is a diamond's heft in relation to most simulants? - ANSWER-Lower
What does an electronic scale require immediately after is it leveled for accurate measurement? - ANSWER- Calibration
What term describes an expert diamond dealer or manufacturer? - ANSWER-Diamantaire
What is a sieve set? - ANSWER-Set of circular plates, each punched with precisely sized holes, used for sorting small, round gems by size
What does cooling a diamond do to spectral absorption peaks? - ANSWER-Sharpens spectral absorption peaks and allows gemologists to identify the optical defects in the diamond 3 / 4
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What can UV-Vis-NIR spectroscopy help identify? - ANSWER-A diamond's absorption of visible light, portions or UV light and infrared regions close to the visible range
What is an agreement that involves multiple payments over time? - ANSWER-Terms of payment
What is the per-carat price of a 2ct diamond selling for
$40,000? - ANSWER-$20,000
What parcel price comes at a premium? - ANSWER-Pick price
How do dealers quote diamond prices? - ANSWER-Per- carat price
What is the term for flaws or imperfections in a diamond?
- ANSWER-Inclusions
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