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GIA Diamonds and Diamond Grading: Assignment 6 Questionnaire Exam 2025/2026 Questions With Correct Ans.

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GIA Diamonds and Diamond Grading: Assignment 6 Questionnaire Exam 2025/2026 Questions With Correct Ans.

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GIA Diamonds and Diamond Grading:
Assignment 6 Questionnaire

How do color centers enable movement of electrons in the band gap of diamond?
A. Reduce transitions
B. Excite protons
C. Maintain ground state
D. Produce steps - ANS - D. Produce steps
\How does light travel?
A. Waves
B. Bursts
C. Right angles
D. Curves - ANS - A. Waves
\How is a colorless, defect-free diamond categorized by band structure?
A. Insulator
B. Conductor
C. Semi-insulator
D. Semiconductor - ANS - A. Insulator
\How is luminescence important for diamond identification?
A. Indicates geographic origin
B. Reveals presence of defects
C. Confirms superdeep formation
D. Separates pink from red diamonds - ANS - B. Reveals presence of defects
\What bodycolor can the GR1 defect produce with high nitrogen concentration?
A. Pink
B. Green
C. Yellow
D. Orange - ANS - B. Green
\What describes the distance between two high points of a light path?
A. Node
B. Radius
C. Velocity
D. Wavelength - ANS - D. Wavelength
\What does irradiation create when it displaces carbon atoms in the crystal lattice?
A. Feathers
B. Graining
C. Vacancies
D. N3 defects - ANS - C. Vacancies
\What energy state does an electron shift to when absorbing visible light?
A. Stable
B. Excited

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Subjects

  • how do color centers enable movement of electrons
  • a reduce transitions b excite protons
  • how is a colorless defect free diamond categoriz

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