Hallmark Gold, KDM and 916 Gold– What’s the Difference?

Gold is a precious that holds cultural and economic value among the buyers in India. Gold is available in various forms based on its purity and composition, with 916 and KDM being the most commonly known types. Hallmark, on the other hand, is a certification that verifies the purity of gold.

What Is Hallmark Gold? 

Hallmarking involves accurately determining and officially recording the precious metal content in jewelry or bullion. The Government of India made gold hallmarking mandatory on 23 June 2021 in 256 districts with at least one Assaying and Hallmarking (A&H) centre, covering 14, 18, and 22-carat gold. Jewelers must register with BIS online for free, and the registration is valid for life. Gold is alloyed to increase durability, but this makes it prone to adulteration. To protect consumers from fraud, the RBI Standing Committee on Gold tasked BIS (Bureau of Indian Standards) with introducing gold hallmarking in 2000 and the silver hallmarking began in 2005. 

What Is KDM Gold? 

KDM gold refers to gold jewelry made using cadmium as a solder, enabling intricate designs. It is commonly available in 22K, which means 91.67% pure gold mixed with other metals. The process involves dividing the gold alloy into required proportions, adding cadmium for soldering, and thoroughly mixing it to create a uniform mixture. This makes the alloy suitable for crafting detailed jewelry patterns. 

What is 916 Gold? 

916 gold, or 22-karat gold, contains 91.6% pure gold, with the remaining 8.40% made up of metals like copper and silver to improve strength and durability. Jewellery made from 916 gold is often hallmarked with "916" or "22K" to confirm its purity. It is widely used for jewelry making, offering a balance between purity and strength, making it suitable for intricate designs and everyday wear. 

difference between hallmark gold & kdm

Difference Between Hallmarked Gold, KDM, and 916 Gold 

The difference between hallmark gold, KDM and 916 gold are mentioned in the table below: 

Hallmark gold 

916 gold 

KDM gold 

Certified pure gold 

Purity level of 91.6% with alloy metal 

May contain cadmium as soldering agent 

Official purity certification 

Commonly recognised gold purity 

Traditional method which is less commonly used 

Accepted widely 

Commonly used in India 

Less used due to health and environment concerns 

Benefits of Gold Hallmarking 

Gold hallmarking is a technique that sets the purity standards of gold ensuring authenticity of gold, thereby offering high resale value of the gold. Hallmarking of gold has other benefits that are mentioned below: 

  1. Ensures credibility and eliminates the risk of purchasing counterfeit or substandard gold. 
  1. Based on the purity and weight of hallmark gold jewelry, the customers can make informed decisions and prevent them from purchasing overcharged low-purity gold. 
  1. As hallmark gold is recognised for its purity and quality, they have resale value. 
  1. Hallmark gold complies with legal requirements thereby avoiding penalties and legal issues related to non-hallmarked gold. 

Why is Hallmark Important for Gold Buyers? 

Hallmark gold is a pure and authentic option over non-hallmark gold and buyers must look for the hallmark while purchasing gold jewelry. The importance of hallmark is mentioned below: 

  1. Hallmark gold ensures purity of the gold as it indicates the gold content denoted in carat, such as 22K which is 99.9% pure. 
  1. Hallmark gold sets quality standards and ensures that the customers get what they pay for in terms of regulatory standards and gold purity. 
  1. Ensures consumer protection by preventing sale of adulterated or low-purity gold at higher prices. 
  1. In India it is mandatory to hallmark gold jewelry under the BIS Act and Rules so that gold ornaments can be sold legally in the market. 

Types of Hallmarks Used in Gold Ornaments 

There are ten different types of hallmarks used in gold ornaments and the details are given in the table below: 

Type 

Gold Purity 

Features 

Uses 

24-Karat Gold 

99.9% 

Soft and malleable 

  1. Investment
  2. High-end jewellery 

22-Karat Gold 

91.6% 

Durable and popular for intricate jewellery designs 

  1. Jewellery
  2. Traditional ornaments 

18-Karat Gold 

75% 

Durable and pure 

High-end jewellery 

14-Karat Gold 

58.3%  

Affordable and durable 

Affordable jewellery 

White Gold 

Gold alloy with white metals 

Shiny, silver-like appearance 

  1. Jewellery
  2. Watches 

Rose Gold 

Gold alloy with copper 

Warm and reddish-pink hue 

  1. Jewellery 
  1. Watches 

Green Gold 

Gold alloy with silver and zinc 

Greenish tint 

Artistic jewellery 

KDM Gold 

Gold alloy with cadmium 

Solderable without heatingTraditional in India 

Traditional Indian jewellery making 

Black Hills Gold 

Distinctive gold jewellery style 

Rose and green gold leaves on a yellow gold base 

Jewellery with unique designs 

Bullion Gold 

High-purity gold bars or coins 

Investment purposes 

  1. Investment
  2. Preservation of wealth 

Gold ETFs 

Financial instrument 

Traded on stock exchanges 

  1. Investment
  2. Diversification of Portfolio 

Gold Hallmarking Process 

The two main techniques for hallmarking gold jewelry are laser and stamp and the details about the techniques are mentioned below:  

  1. Stamps are the conventional hallmarking technique where the gold jewelry is stamped. But the process may cause deformation if the gold is delicate or hollow.  
  1. Laser is one common method of hallmark used by most manufacturers and it remains subtle without deforming the jewelry. But the hallmark may polish out if a gold ring requires sizing. 

Resale Value of Hallmark Gold 

The hallmark gold has high resale value than non-hallmark gold due to its purity and authenticity. Hallmark gold ensures purity level of 91.6% purity and is certified by the Bureau of Indian Standards (BIS), thereby ensuring guaranteed level of purity. Hallmark gold offers a high return on investment and ensures smoother resale processes due to reduced chance of disputes.   

How to Check Hallmark on Gold Jewlery? 

The steps to check the hallmark on your gold jewelry are mentioned below: 

  1. Look for the BIS Logo to identify the hallmarking on the gold item and it resembles a tiny triangular shape.  
  1. Check for the purity or fineness symbol which is determined based on the degree of gold purity. For example: 
  1. 22K916 signifies a 22-carat gold: 91.6% pure 
  1. 18K750 signifies an 18-carat gold: 75% pure 
  1. 14K585 signifies a 14-carat gold: 58.5% pure 
  1.  Look for the six-digit alphanumeric code, Hallmark Unique Identification (HUID) number, which has been made compulsory and effective by the government from 1 April 2023 though it was first introduced from 1 July 2021. Customers can validate the number from BIS Care App by clicking on ‘Verify HUID’. 

Note: Currently, the HUID code is not mandatory. 

FAQs on Hallmark Gold

  • How to check gold hallmark online?

    Visit the official website of the Bureau of Indian Standards (BIS) or use the BIS Care app, to check the gold hallmark online. Enter the Hallmark Unique Identification (HUID) number to verify the purity and authenticity of the gold item registered with BIS. 

  • How to check the gold serial number?

    The gold serial number is also known as HUID number which can be verified by visiting either the BIS website or the BIS Care app. The details of purity, weight, and registered jeweler will be displayed by entering the HUID number. 

  • How to identify 916 gold?

    Check for the hallmark symbol which is usually the BID mark followed by ‘916’ that denoted 22-karat purity level engraved on the jewelry. 

  • What is the hallmark code for gold?

    The hallmark code for gold jewelry includes purity in carats, BIS logo, HUID number, identification mark of jeweler that ensures the authenticity and compliance with national standards. 

  • Are penalties charged for selling non-hallmarked gold jewelry in India?

    Yes, penalties will be charged for selling non-hallmark gold as it is illegal to sell gold ornaments without BIS hallmark as per the BIS Act and rules. 

  • Is hallmarked gold jewelry more expensive than non-hallmarked gold?

    Yes, hallmarked gold jewelry generally costs more than non-hallmarked gold as the former type offers high quality assurance, thereby potentially influencing the price of the gold jewelry. 

  • Can I get my gold jewelry hallmarked if it was purchased without a hallmark?

    Yes, your gold jewelry can be hallmarked by visiting a BIS-certified hallmarking centre, where the jewelry will be tested for its purity and the BIS hallmark will be engraved if it meets the required standards. 

  • How to calculate KDM charges on gold jewelry?

    The KDM charges on gold jewelry is calculated depending on the prevailing gold rate at the time of purchase and the final price of the jewelry is determined by using the following formula: Gold price x weight (in grams) + making charges + 3.00% GST on (jewelry price + making charges). 

  • Who regulates the assaying and hallmarking centres?

    The­ Bureau of Indian Standards regulates the Assaying and hallmarking centres by conducting regular audits of the centres to asse­ss the performance of purity test of gold item. Legal actions are taken by BIS in case of non-compliance. 

  • What is the impact of hallmark gold on gold loan approval?

    Hallmark gold authenticates the purity of the gold item and is used as collateral in case of gold loan that makes loan approval quicker and offers high loan amount as lenders perceive less risk. 

  • Will I get any compensation if my hallmarked jewelry does not meet the purity standards?

    Yes, the customer will be compensated if the hallmarked jewelry does not meet the purity standards. The compensation will be equal to two times the amount of difference calculated depending on the shortage of purity for the weight of such article sold and the testing charges. 

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