GIA Diamonds and Diamond Grading: Assignment 4 Questionnaire Exam 2025/2026 Questions With Correct Ans.

GIA Diamonds and Diamond Grading:
Assignment 4 Questionnaire

What are the horizontal tunnels in an underground mine?
A. Drifts
B. Caves
C. Shafts
D. Blocks - ANS - A. Drifts
\What are the main steps in diamond extraction?
A. Sampling, mining, and ranking
B. Removing, sorting, and appraising
C. Crushing, separating, and assessing
D. Sizing, concentrating, and recovering - ANS - D. Sizing, concentrating, and recovering
\What caused the shift in diamond mining from secondary deposits to primary?
A. Economics
B. Technology
C. Ease of operations
D. Diamond concentration - ANS - B. Technology
\What countries produce the most diamonds by value (U.S. dollars) and volume in carat weight?
A. Russia, Botswana, and Canada
B. Angola, South Africa, and India
C. Brazil, Australia, and New Zealand
D. United States, Namibia, and Zimbabwe - ANS - A. Russia, Botswana, and Canada
\What diamond deposit type is found outside a lamproite pipe?
A. Primary
B. Original
C. Secondary
D. Overburden - ANS - C. Secondary
\What do geologists look for to locate a primary diamond deposit?
A. Termites
B. Gold nuggets
C. Trace elements
D. Indicator minerals - ANS - D. Indicator Minerals
\What is geochemical testing?
A. Seismic analysis
B. Ore grade concentration
C. Chemical analysis of a sample
D. Thermal conductivity of a mineral - ANS - C. Chemical analysis of a sample
\What is the main consideration in mining a diamond deposit?
A. Climate
B. Location