You may be confusing a gold purity -- 14 karat, with diamond weight -- 14 carat.
However, today on Blue Nile, you can purchase such a gemstone and pay between US$365.472 and US$3,109,575, depending on the cut, colour, clarity and exact carat weight that you want.
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14 parts out of a total of 24 parts. 24 carat gold is pure gold, so 14 carat is 58.3% gold (the balance is generally silver). But that is a measure of the gold parts-per-thousand, or 583 parts-per-thousand in 14 k gold, not a measure by weight. Because gold is much heavier than the medals added to make the alloy, the percentage of the gold content by weight may be in the 70% to 80% range depending on the mix of copper, silver, and other metals.
The numbers are probably an indication of the purity of the gold. Pure gold is 24 carat but 22 carat, 18 carat, 14 carat and 9 carat are all common.
14 karat diamond
Q
[(1.08)^14] times 125 = 367.15