| |
|
Weight |
|
Grams (g) |
|
Pennyweight
(dwt) |
|
Troy Ounce
(oz t) |
|
Ounce
Avoirdupois
(oz av) |
|
1 Grams (g) |
|
1 |
|
0.643 |
|
0.032 |
|
0.035 |
1
Pennyweight
(dwt) |
|
1.555 |
|
1 |
|
0.05 |
|
0.055 |
Troy Ounce
(oz t) |
|
31.103 |
|
20 |
|
1 |
|
1.097 |
Ounce
Avoirdupois
(oz av) |
|
28.3495 |
|
18.229 |
|
0.911 |
|
1 |
|
|
|
Gold Karat
Information
Since ancient times, the purity of gold has been defined by
the term karat, which is 1/24 part of pure gold by weight.
Pure gold is equivalent to 24K. Gold purity may also be
described by its fineness, which is the amount of pure gold
in parts per 1000. For example, a gold ring containing 583
fine gold has 583 parts (58.3%) gold and 417 parts (41.7%)
of other base metals. Federal Trade Commission rules require
that all jewelry items sold in the United States as gold
shall be described by "a correct designation of the karat
fineness of the alloy."
|
Karat Gold |
|
Parts Gold |
|
%
Gold |
|
9kt |
|
9 in 24 |
|
37.5% |
|
10kt |
|
10 in 24 |
|
41.67% |
|
12kt |
|
12 in 24 |
|
50% |
|
14kt |
|
14 in 24 |
|
58.33% |
|
18kt |
|
18 in 24 |
|
75% |
|
22kt |
|
22 in 24 |
|
91.67% |
|
24kt |
|
24 in 24 |
|
99.99% |
Weighing
Precious Metals
The weight of a piece of gold jewelry is a factor that helps
to determine its value. It is important because it is an
indication of the amount of fine gold in an item of jewelry.
Grams (g) and pennyweights (dwt) are the units of weight
most commonly used in weighing gold. Gold and silver are
almost always weighted in the troy system of weights where
one pound troy equals twelve troy ounces and twenty
pennyweights equals one troy ounce. The Avoirdupois weight
system, where one pound equals 16 ounces, is used in the
United States for most everything except precious metals. The
following table summarizes useful weight conversions. |
|
