Understanding Gold Purity: 18K, 20K, 22K, 24K Gold Explained

In India, gold is highly valued for its cultural importance, and many people buy it for weddings, festivals, investments, and other purposes. While purchasing gold jewellery and coins, one may notice the different types of markings (18K, 20K, 22K, 24K) on gold items. These numbers indicate the purity of gold in a specific piece of gold jewellery. Understanding the difference between 18K, 20K, 22K, and 24K gold is essential to making informed purchasing decisions.

What Does Gold Purity Mean?

Gold purity is defined as the amount of pure gold that is present in each piece of gold jewellery, coin, or ornament. Since gold is a naturally soft metal, jewellers typically mix it with various other metals (Copper, Silver, Zinc, Nickel, etc) to add strength and durability to the jewellery.
Gold purity is measured using the Karat System. In this system, pure gold is classified as 24 Karats with 99.9% pure gold. This means:

• 24K gold contains almost pure gold
• 22K gold contains 22 parts pure gold
• 18K gold contains 18 parts pure gold

The remaining Karats represent the amounts of alloyed metals that contribute to the strength and durability of the Gold.

Karat vs Carat: Understanding the Difference

Karat and carat are often confused by consumers, as the two terms sound the same. They're actually two different types of measurement. Karat is a measure of how pure gold is, while carat is a measure of the weight of gemstones such as diamonds. This distinction is especially important when you are purchasing jewellery that is made of both gold and precious stones.

Understanding this difference helps avoid confusion while shopping for jewellery.

Understanding 18K Gold

18K gold contains 18 parts of pure gold and 6 alloy metals, meaning 75% of the material is pure gold.

18K Gold = (18/24)×100=75%

Because it has a high percentage of alloy metals, 18K gold is one of the most durable options among all types of jewellery. This additional amount of alloyed material provides the equilibrium needed for the metal to resist wear when worn on a daily basis. It is ideal for office wear, ring wear, bracelet wear, gemstone jewellery, and diamond jewellery.

Jewellers frequently use 18K gold because of its strong ability to maintain a shape while resisting scratches in intricate designs and modern styles.

The different kinds of colour of 18K gold provide a flexible choice for use in contemporary jewellery and may be found in the form of rose gold, white gold, or yellow gold.

Understanding 20K Gold

20K gold is less commonly available in India when compared with both 18K and 22K gold jewellery. However, 20K gold exists as a compromise between buyers desiring both high purity and durability. 20K gold contains approximately 83.3% pure gold.

20K Gold = (20/24)×100=83.33

Furthermore, 20K gold can provide a brighter and richer appearance compared to 18K gold, while offering a more robust appearance than 22K gold. Therefore, there are several reasons buyers may choose to select 20K jewellery versus other purities, including:

• It has a brighter appearance than 18K gold.
• It offers increased durability.
• It provides a balance of purity and strength.

However, 20K gold jewellery is not typically found in large volumes within the major jewellery markets of India. 20K gold jewellery can serve as an alternative to those looking for slightly higher purity levels of gold without compromising durability.

Understanding 22K Gold

In India, 22-carat gold purity is the most commonly used type of gold in traditional jewellery. It consists of 22 parts pure gold and 2 parts other metals. Therefore, if a piece of jewellery is made from 22-carat gold, it is approximately 91.66% pure gold

22K Gold = (22/24)×100=91.66

This is also why 22 karat gold is often referred to as “916 gold”.

When talking about the purity of 22K gold, this is one of the main numbers to keep in mind as a buyer. Some popular uses for 22K gold include:

• Bridal jewellery
• Necklaces
• Bangles
• Earrings
• Festival jewellery

Due to its rich yellow colour, 22K gold offers a traditional style to your jewellery and continues to be popular in India.

22K gold is typically used for the design of most traditional Indian jewellery collections because it is a good compromise between purity, appearance, and usability.

Understanding 24K Gold

24K gold generally has a bright yellow shade and a very high intrinsic value. It is an extremely pure form of gold, usually containing 99.9% gold.
As a result, 24K gold is not commonly used to make standard jewellery. Instead, it is mainly used for:

• gold bullion
• gold coins
• gold bars
• investment-related products
• ceremonial items

As mentioned above, many buyers purchase 24K gold because of the enormous intrinsic value associated with 24K gold.

During times of economic uncertainty or inflation, many consumers purchase 24K gold as an alternative method of preserving their wealth and purchasing power.

18K vs 22K vs 24K Gold: Key Differences 

Purchasers need to understand the various gold purity levels so that they can easily select the right type of gold for their needs.

The table below illustrates the important differences between 18K, 22K, and 24K gold.

When comparing 18K versus 22K versus 24K Gold, the best choice for you will depend on the intended use for the gold.

How to Check Gold Purity

Checking purity is extremely important before purchasing jewellery.

BIS Hallmark
A BIS hallmark certifies the purity of gold jewellery according to Indian standards, with the following benefits:

• gold purity
• jeweller identification
• certification of authenticity

Common hallmark numbers include:

• 750 for 18K gold
• 833 for 20K gold
• 916 for 22K gold
• 999 for 24K gold

These markings help buyers identify genuine purity standards.

Understand the Jewellery Bill

A proper invoice should include:

• gold purity
• weight
• making charges
• taxes
• hallmark details

This improves pricing transparency and resale confidence.

Buy from Trusted Jewellers

In order to ensure a consumer receives durable jewellery, they need to purchase their jewellery from a trustworthy jeweller. They adhere to proper certification and purity levels while having good buy-back and exchange policies.

Read Also: Will Gold Prices Decline In India in the Coming Days?

To Conclude

By understanding gold purities, you will be able to make wiser decisions with respect to jewellery or investment products you wish to purchase. With the choice of either or any 18K, 20K, 22K, 24K gold, you can determine how gold purity relates to each’s durability, appearance and pricing. Once you know how gold purity relates to strength and price, comparing different gold products can be much easier. 

For traditional Indian designs, 22K remains the most popular. For modern wear styles, 18K would be a great choice. However, 24K remains the preferred choice for anyone looking to invest in gold. If you want to monetise your gold without selling it, Poonawalla Fincorp’s Gold Loan can provide you with quick loan approval and competitive interest rates. 

FAQs

What is gold purity in simple terms?
Purity of gold denotes how much pure gold exists in either a piece of jewellery, a coin or a similar item.

What is the purity of 22K gold?
The purity of 22K gold is approximately 91.6% pure gold and 8.4% alloy metals.

What is the purity of 24K gold?
The purity of 24K gold is approximately 99.9% pure gold and is generally regarded as one of the purest forms.

Which is better: 18K, 22K, or 24K gold?
The best option will depend on your intended purpose for purchasing the jewellery. 18K gold jewellery is appropriate for daily use, while 22K gold jewellery is generally regarded as appropriate for traditional forms of jewellery. 24K gold is typically viewed as an investment.

How can I check the purity of gold when I purchase?
Always look out for India’s Bureau of Indian Standards (BIS) hallmark and proper purity marking for any piece of jewellery before making your purchase.