It is not the weight, it is the fineness/ purity of the gold alters the carat weight. This id done by fractioning and precentages; we all know 24ct is the 100% pure gold.So 9ct is 9/24th's of 100% gold, which equals 37.5%. Hence why the hallmarking is given as parts per thousand of gold ( 9ct = 375)
9ct = hallmark 375 = 37.5% gold, 62.5% base metals/alloy
18ct = hallmark 750 = 75% gold, 25% base metals/alloy
22ct = hallmark 916 = 91.6% gold, 8.4% base metals/alloy
24ct = hallmark 990 = 99.0% gold which is the minimum for it to be classed as pure.
Gold is mixed with alloys to make it stronger, durable and less malleable, retaining its shape when cast. Therefore 9ct and 18ct is a preferred choice.
24 karat gold is 100% gold, 18 karat gold is 75% gold, 14 karat gold is 58.3% gold, and 10 karat gold is 41.7% gold. The remaining percentage in each karat weight consists of other metals like silver, copper, and zinc, which are added to improve the durability and color of the gold.
The main difference between 12 karat and 14 karat gold is the purity of the gold. 12 karat gold contains 50% pure gold, while 14 karat gold contains 58.3% pure gold. This means that 14 karat gold is slightly higher in gold content and therefore more valuable than 12 karat gold.
The main difference between 24 karat gold and 10 karat gold is the purity. 24 karat gold is pure gold (99.9% gold) while 10 karat gold is only 41.7% gold with the rest being alloyed with other metals for strength and durability. As a result, 24 karat gold is softer and more prone to scratches and bends compared to 10 karat gold.
24 karat gold is pure gold. 22 karat gold is only about 92% pure, so you should expect it to be slightly cheaper ... but not much, because whatever it's alloyed with has some value also (probably not as much as gold, though).
the K after a 10,14,18,22,24 in gold pieces in the US, k= karat which refers to the fineness of gold alloys (pure gold is 24 karat; 14 karat is 14 parts gold and 10 parts other metal or metals) and the word Carat refers to gem weights.
Both 18 karat and 14 karat gold have a similar level of shine because the brightness of gold primarily comes from its natural properties. The main difference between the two is the amount of pure gold in the alloy - 18 karat gold has a higher gold content than 14 karat gold, making it slightly richer in color.
10 karat gold is 10 parts of pure gold to 14 parts of other metal and 14 karat gold is 14 parts of pure gold.
The gold content of 10 karat gold is 41.7% gold and the gold content of 24 karat gold is 100%.
The gold content in 14 karat gold is 58.3% and the gold content in 24 karat gold is pure gold.
The main difference between 18 karat gold and 24 karat gold is the purity level. 24 karat gold is pure gold with a purity of 99.9%, while 18 karat gold contains 75% gold and 25% other metals like copper or silver. As a result, 24 karat gold is softer and more prone to scratches compared to 18 karat gold, which is more durable and suitable for jewelry making.
The main difference between 18 karat and 24 karat gold is the purity. 24 karat gold is pure gold, meaning it is 99.9% gold, while 18 karat gold is only 75% gold mixed with other metals for durability. This makes 24 karat gold softer and more prone to damage compared to 18 karat gold.
Karat - The karat (symbol kt) a unit of measure of the amount of pure gold in a metal. One karat represents 1/24th of an alloy's total weight. One hundred percent gold is 24 karats.24-karat gold = .995 to .9999922-karat gold = .91618-karat gold = .75014-karat gold = .58310-karat gold = .4167