Diamonds and Diamond Grading:
Chapter 14
A round brilliant diamond's table size is expressed as
A.
excellent, good, or fair.
B.
small, medium, or large.
C.
a ratio of its depth to its diameter.
D.
a percentage of its average girdle diameter. - ANS - a percentage of its average girdle diameter
\A transparent measuring device divided into millimeters and tenths of a millimeter, used to
measure a diamond's table, is called a
A.
ruler.
B.
table gauge.
C.
micrometer.
D.
tape measure. - ANS - table gauge
\A weight-retention method that adjusts the angles of some facets to allow portions of a
diamond's girdle to be thicker is called
A.
painting.
B.
digging out.
C.
brillianteering.
D.
final polishing. - ANS - painting
\An advantage of the face-up method of crown-angle estimation is that it
A.
can be used with mounted diamonds.
B.
can be used for several cutting styles.
C.
can be performed without magnification.
D.
is based on a view of the actual crown angle. - ANS - can be used with mounted diamonds
Chapter 14
A round brilliant diamond's table size is expressed as
A.
excellent, good, or fair.
B.
small, medium, or large.
C.
a ratio of its depth to its diameter.
D.
a percentage of its average girdle diameter. - ANS - a percentage of its average girdle diameter
\A transparent measuring device divided into millimeters and tenths of a millimeter, used to
measure a diamond's table, is called a
A.
ruler.
B.
table gauge.
C.
micrometer.
D.
tape measure. - ANS - table gauge
\A weight-retention method that adjusts the angles of some facets to allow portions of a
diamond's girdle to be thicker is called
A.
painting.
B.
digging out.
C.
brillianteering.
D.
final polishing. - ANS - painting
\An advantage of the face-up method of crown-angle estimation is that it
A.
can be used with mounted diamonds.
B.
can be used for several cutting styles.
C.
can be performed without magnification.
D.
is based on a view of the actual crown angle. - ANS - can be used with mounted diamonds
