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Which technique is used to distinguish between imitation and pure diamond?

Which technique is used to distinguish between imitation and pure diamond?

مشابہت اور خالص ہیرے کے درمیان فرق کرنے کے لئے کون سی تکنیک استعمال کی جاتی ہے؟
Explanation
  • Pure diamonds have a high refractive index (~2.42), which differs from imitation diamonds.
  • Measuring the refractive index helps distinguish real diamonds from synthetic or fake ones.