GIA Diamonds and Diamond Grading 10-
12 Exam Questions and Answers
The inclusion called bearding consists of tiny
A.
knots.
B.
needles.
C.
feathers.
D.
grain lines. - Answer-C.
feathers.
With darkfield illumination, light is directed into the stone from
A.
below.
B.
,above.
C.
the side.
D.
all directions. - Answer-C.
the side.
Inclusions are easier to see using
A.
ultraviolet light.
B.
darkfield illumination.
C.
overhead spot lighting.
D.
overhead fluorescent lighting. - Answer-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. - Answer-D.
an included crystal.
Trigons are
A.
drag lines.
B.
color centers.
C.
growth marks.
D.
twinning planes. - Answer-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. - Answer-C.
knot.
12 Exam Questions and Answers
The inclusion called bearding consists of tiny
A.
knots.
B.
needles.
C.
feathers.
D.
grain lines. - Answer-C.
feathers.
With darkfield illumination, light is directed into the stone from
A.
below.
B.
,above.
C.
the side.
D.
all directions. - Answer-C.
the side.
Inclusions are easier to see using
A.
ultraviolet light.
B.
darkfield illumination.
C.
overhead spot lighting.
D.
overhead fluorescent lighting. - Answer-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. - Answer-D.
an included crystal.
Trigons are
A.
drag lines.
B.
color centers.
C.
growth marks.
D.
twinning planes. - Answer-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. - Answer-C.
knot.
