Jewelry Weight Guide: Understanding Karats, Pennyweights, and Carats

Gold Karats Explained

Karats measure gold purity: 24K = 100% pure gold, 18K = 75% gold, 14K = 58.5% gold, 10K = 41.7% gold (minimum legal karat in the US).

Understanding Carat Weight

Carats (ct) measure gemstone weight, not gold purity. One carat = 0.2 grams. Carat weight directly affects gemstone size, but size also depends on gem type.

Carat Total Weight vs Carat Weight Per Stone

In jewelry with multiple stones, CTW (carat total weight) represents combined weight of all stones—not the weight of each stone.

Pennyweights and Grams

Precious metals are weighed in pennyweights (dwt) or grams. One pennyweight = 1.555 grams. One troy ounce = 31.103 grams = 20 pennyweights.

Why Weight Matters Beyond Price

Weight affects durability: heavier pieces resist bending and scratching better. Weight affects comfort: very heavy pieces may be uncomfortable for daily wear.

Conclusion

Understanding jewelry weights helps you evaluate purchases intelligently. Karats measure gold purity. Carats measure gemstones. Weight affects price, durability, comfort, and appearance.