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Difference Between Hallmark Gold & KDM Gold

Many buyers confuse Hallmark Gold and KDM Gold, but they are completely different concepts.

What is Hallmark Gold?

Hallmarking certifies gold purity through authorized testing.

In India, BIS hallmarking verifies authenticity.

Example:

  • 22K = 91.6% gold
  • 18K = 75% gold

What is KDM Gold?

KDM refers to a soldering process previously used in jewelry manufacturing involving cadmium.

Modern jewelry manufacturing now avoids cadmium due to health concerns.

Important Difference

  • Hallmark = purity certification
  • KDM = manufacturing method

Always prioritize BIS hallmark certification when buying jewelry.

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