GIA Diamonds and Diamond Grading
10-12 Exam Questions & Answers
The inclusion called bearding consists of tiny
A.
knots.
B.
needles.
C.
feathers.
D.
grain lines. - ANSWERS-C.
feathers.
With darkfield illumination, light is directed into the stone from
A.
below.
B.
above.
C.
the side.
D.
all directions. - ANSWERS-C.
the side.
,Inclusions are easier to see using
A.
ultraviolet light.
B.
darkfield illumination.
C.
overhead spot lighting.
D.
overhead fluorescent lighting. - ANSWERS-B.
darkfield illumination.
A solid mineral body enclosed within a diamond (or other gem) is
A.
a knot.
B.
a natural.
C.
internal graining.
D.
an included crystal. - ANSWERS-D.
an included crystal.
Trigons are
A.
drag lines.
B.
, color centers.
C.
growth marks.
D.
twinning planes. - ANSWERS-C.
growth marks.
An included diamond crystal that extends to the surface of a fashioned diamond is called a
A.
pit.
B.
chip.
C.
knot.
D.
laser drill-hole. - ANSWERS-C.
knot.
An example of a blemish is a
A.
chip.
B.
knot.
C.
bruise.
D.
10-12 Exam Questions & Answers
The inclusion called bearding consists of tiny
A.
knots.
B.
needles.
C.
feathers.
D.
grain lines. - ANSWERS-C.
feathers.
With darkfield illumination, light is directed into the stone from
A.
below.
B.
above.
C.
the side.
D.
all directions. - ANSWERS-C.
the side.
,Inclusions are easier to see using
A.
ultraviolet light.
B.
darkfield illumination.
C.
overhead spot lighting.
D.
overhead fluorescent lighting. - ANSWERS-B.
darkfield illumination.
A solid mineral body enclosed within a diamond (or other gem) is
A.
a knot.
B.
a natural.
C.
internal graining.
D.
an included crystal. - ANSWERS-D.
an included crystal.
Trigons are
A.
drag lines.
B.
, color centers.
C.
growth marks.
D.
twinning planes. - ANSWERS-C.
growth marks.
An included diamond crystal that extends to the surface of a fashioned diamond is called a
A.
pit.
B.
chip.
C.
knot.
D.
laser drill-hole. - ANSWERS-C.
knot.
An example of a blemish is a
A.
chip.
B.
knot.
C.
bruise.
D.
