GIA DIAMOND AND DIAMOND GRADING FINAL
EXAM ACTUAL EXAM COMPLETE QUESTIONS
WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS ) // ALREADY GRADED A+
// BRAND NEW!!
If a diamond's total depth percentage is 51.0 percent, its cut grade will be...
A. Superior or Excellent
B. Excellent or Very Good
C. Very Good or Good
D. Fair or Poor - ANSWER-D. Fair or Poor
Chambering and block caving are methods used in...
A. mining diamond pipes
B. mining alluvial deposits
C. testing the productivity of diamond pipes
D. testing the productivity of alluvial deposits - ANSWER-A. mining diamond
pipes
Diamond's attraction to grease is used in...
A. separating diamond from ore gravels
B. fashioning diamond into fancy shapes
C. separating gem-quality from industrial diamonds
D. sorting and grading operations at the Diamond Trading Company (DTC) -
ANSWER-A. separating diamond from ore gravels
Dense media separation is based on the fact that...
A. diamonds stick to grease
B. most diamond fluoresce when X-rayed
C. diamonds float to the top of a mix of crushed ore
D. diamonds sink to the bottom of a mix of crushed ore - ANSWER-D. diamonds
sink to the bottom of a mix of crushed ore
Removal of mineral-bearing ore from a surface excavation is called...
A. drift mining
,B. open pit mining
C. open air mining
D. original source mining - ANSWER-B. open pit mining
Dirt and clay are washed from diamond-bearing ore by...
A. cleaners
B. agitators
C. scrubbers
D. grease belts - ANSWER-C. scrubbers
A horizontal tunnel drilled through a diamond pipe is called a...
A. path
B. drift
C. shaft
D. channel - ANSWER-B. drift
Most modern diamond mining operations are...
A. done with simple hand tools
B. small in scale and not very expensive
C. large in scale and extremely expensive
D. performed in temperature-controlled environments - ANSWER-C. large in scale
and extremely expensive
The largest percentage of world diamond production (by weight) is mined in...
A. Brazil
B. Angola
C. Australia
D. Indonesia - ANSWER-C. Australia
African diamonds are recovered from...
A. pipe deposits only
B. alluvial deposits only
C. marine deposits only
D. pipe, alluvial and marine deposits - ANSWER-D. pipe, alluvial, and marine
deposits
,During emplacement, if diamonds are exposed to high temperature along with
decreased pressure for a long period, they will...
A. melt
B. explode
C. vaporize
D. convert to graphite - ANSWER-D. convert to graphite
The concentration of diamonds within a pipe is called...
A. drift
B. ore grade
C. overburden
D. rough grade - ANSWER-B. ore grade
A profitable mine...
A. is close to a source of water
B. has a high percentage of micro diamonds
C. meets governmental and environmental regulations
D. produces diamonds whose value is higher than the mine's operating costs -
ANSWER-D. produces diamonds whose value is higher than the mine's operating
cost
Diamond rough suitable for use in jewelry is called...
A. cuttable
B. grade A
C. top quality
D. jewelry quality - ANSWER-A. cuttable
Diamond rough suitable for use in tools, drills and abrasives is...
A. cuttable quality
B. industrial quality
C. primarily from marine deposits
D. a byproduct of the exploration process - ANSWER-B. industrial quality
Gravity sorting separates diamonds from...
A. river gravels
B. lighter materials
C. heavier materials
, D. indicator materials - ANSWER-B. lighter materials
The first step in exploring for diamonds is to...
A. collect bulk samples of ore
B. search for ancient volcanoes
C. look for the oldest parts of the earth's crust
D. examine river gravels for indicator minerals - ANSWER-C. look for the oldest
parts of the earth's crust
Indicator minerals in kimberlite and lamproite might include tiny...
A. emeralds
B. sapphires
C. amethysts
D. diamonds - ANSWER-D. diamonds
Diamonds classified as cuttable can be 100 times more valuable than...
A. marine diamonds
B. alluvial diamonds
C. industrial diamonds
D. gem quality diamonds - ANSWER-C. industrial diamonds
Most of the diamonds mined today come from...
A. pipes
B. beaches
C. riverbeds
D. ocean floor - ANSWER-A. pipes
A mine's potential profitability depends in part on...
A. its ore grade
B. its location on a craton
C. having a small, compact pipe
D. a good kimberlite-to-lamproite ratio - ANSWER-A. its ore grade
The Argyle mine is famous for diamonds that are...
A. pink
B. blue
C. large
EXAM ACTUAL EXAM COMPLETE QUESTIONS
WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS ) // ALREADY GRADED A+
// BRAND NEW!!
If a diamond's total depth percentage is 51.0 percent, its cut grade will be...
A. Superior or Excellent
B. Excellent or Very Good
C. Very Good or Good
D. Fair or Poor - ANSWER-D. Fair or Poor
Chambering and block caving are methods used in...
A. mining diamond pipes
B. mining alluvial deposits
C. testing the productivity of diamond pipes
D. testing the productivity of alluvial deposits - ANSWER-A. mining diamond
pipes
Diamond's attraction to grease is used in...
A. separating diamond from ore gravels
B. fashioning diamond into fancy shapes
C. separating gem-quality from industrial diamonds
D. sorting and grading operations at the Diamond Trading Company (DTC) -
ANSWER-A. separating diamond from ore gravels
Dense media separation is based on the fact that...
A. diamonds stick to grease
B. most diamond fluoresce when X-rayed
C. diamonds float to the top of a mix of crushed ore
D. diamonds sink to the bottom of a mix of crushed ore - ANSWER-D. diamonds
sink to the bottom of a mix of crushed ore
Removal of mineral-bearing ore from a surface excavation is called...
A. drift mining
,B. open pit mining
C. open air mining
D. original source mining - ANSWER-B. open pit mining
Dirt and clay are washed from diamond-bearing ore by...
A. cleaners
B. agitators
C. scrubbers
D. grease belts - ANSWER-C. scrubbers
A horizontal tunnel drilled through a diamond pipe is called a...
A. path
B. drift
C. shaft
D. channel - ANSWER-B. drift
Most modern diamond mining operations are...
A. done with simple hand tools
B. small in scale and not very expensive
C. large in scale and extremely expensive
D. performed in temperature-controlled environments - ANSWER-C. large in scale
and extremely expensive
The largest percentage of world diamond production (by weight) is mined in...
A. Brazil
B. Angola
C. Australia
D. Indonesia - ANSWER-C. Australia
African diamonds are recovered from...
A. pipe deposits only
B. alluvial deposits only
C. marine deposits only
D. pipe, alluvial and marine deposits - ANSWER-D. pipe, alluvial, and marine
deposits
,During emplacement, if diamonds are exposed to high temperature along with
decreased pressure for a long period, they will...
A. melt
B. explode
C. vaporize
D. convert to graphite - ANSWER-D. convert to graphite
The concentration of diamonds within a pipe is called...
A. drift
B. ore grade
C. overburden
D. rough grade - ANSWER-B. ore grade
A profitable mine...
A. is close to a source of water
B. has a high percentage of micro diamonds
C. meets governmental and environmental regulations
D. produces diamonds whose value is higher than the mine's operating costs -
ANSWER-D. produces diamonds whose value is higher than the mine's operating
cost
Diamond rough suitable for use in jewelry is called...
A. cuttable
B. grade A
C. top quality
D. jewelry quality - ANSWER-A. cuttable
Diamond rough suitable for use in tools, drills and abrasives is...
A. cuttable quality
B. industrial quality
C. primarily from marine deposits
D. a byproduct of the exploration process - ANSWER-B. industrial quality
Gravity sorting separates diamonds from...
A. river gravels
B. lighter materials
C. heavier materials
, D. indicator materials - ANSWER-B. lighter materials
The first step in exploring for diamonds is to...
A. collect bulk samples of ore
B. search for ancient volcanoes
C. look for the oldest parts of the earth's crust
D. examine river gravels for indicator minerals - ANSWER-C. look for the oldest
parts of the earth's crust
Indicator minerals in kimberlite and lamproite might include tiny...
A. emeralds
B. sapphires
C. amethysts
D. diamonds - ANSWER-D. diamonds
Diamonds classified as cuttable can be 100 times more valuable than...
A. marine diamonds
B. alluvial diamonds
C. industrial diamonds
D. gem quality diamonds - ANSWER-C. industrial diamonds
Most of the diamonds mined today come from...
A. pipes
B. beaches
C. riverbeds
D. ocean floor - ANSWER-A. pipes
A mine's potential profitability depends in part on...
A. its ore grade
B. its location on a craton
C. having a small, compact pipe
D. a good kimberlite-to-lamproite ratio - ANSWER-A. its ore grade
The Argyle mine is famous for diamonds that are...
A. pink
B. blue
C. large
