Gold is measured in carats (or karats) because the system provides a simple, standardized way to express the purity of gold alloys. 24 carats represent pure gold. For example, 12 carats would mean exactly 50% pure gold.
This system works by dividing the total weight of a gold item into 24 parts, making it easy to understand the proportion of pure gold in an alloy. While it may seem unusual that the standard is based on 24 parts instead of 100 or 1000 (like percentages or the metric system), this traditional method has stood the test of time.
In Europe and the United States, the carat system is the most widely used. However, many countries also use the parts per 1000 system. That’s why you’ll often see markings like 18K alongside 750, which both mean 75% pure gold.
Quick Breakdown of Gold Purity
24 Carat – 100% pure gold (no alloy added)
22 Carat – 91.6% gold
18 Carat – 75% gold
14 Carat – 58.5% gold
9 Carat – 37.5% gold
8 Carat – 33.3% gold
Measuring Gold by Weight
Gold is also commonly measured in troy ounces on global markets like the London Metal Exchange (LME).
1 troy ounce = 31.1 grams
This is an important standard for pricing gold internationally.
At Cashinn Pawnshop, we specialize in evaluating, buying, and selling gold in all purities and weights. Whether you have 8 carat jewelry, an 18 carat ring, or even 24 carat investment gold, our expert team can help you understand its value and get the best deal.
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