Gold comes in different purities measured in Karats, and each Karat represents one 24th of pure gold. Here is the difference between 18K, 21K, and 24K gold:
1. 24 karat gold
- Purity : 24 karat means the gold is 99.9% pure (i.e. 24 parts gold out of 24 parts).
- Properties : 24k gold is the purest, and is very soft and malleable, making it less ideal for use in jewelry that is subject to daily wear and tear.
- Uses : Mainly used in bullion, coins and some types of fine jewelry that are not used daily.
2. 21 karat gold
- Purity : 21 karat means the gold is 87.5% pure (i.e. 21 parts gold and 3 parts other metals).
- Properties : More durable than 24k gold due to the presence of other metals, making it more suitable for making everyday jewelry.
- Uses : It is used in many countries to make everyday jewelry and art pieces.
3. 18k gold
- Purity : 18 karat means the gold is 75% pure (i.e. 18 parts gold and 6 parts other metals).
- Properties : It has higher durability than 21k and 24k gold, making it better resistant to corrosion and damage.
- Uses : Common in fine jewelry for everyday use and in pieces that require durability and strength.
Abstract
- 24k gold : very pure (99.9%) but soft, used in bullion and coins.
- 21k gold : 87.5% pure, more durable than pure gold, popular in everyday jewelry.
- 18K Gold : 75% pure, the most durable and corrosion resistant, popular in everyday fine jewelry.
