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Hallmarking symbols

hallmarking-symbols

hallmarking-ring



Ex:  22Kt Hallmarking in Gold Ring

 

(Ref. Extra ordinary gazette notification no. 1436/21 dated 17th March 2006)

 

 Legal standards for  Gold  Jewellery (PPT)
KARAT STANDARD   FINENESS
24Kt. equivalent to 999
22Kt. equivalent to 916
21Kt.  equivalent to 875
18Kt.  equivalent to 750
14Kt. equivalent to 585
10Kt. equivalent to 417
9Kt.  equivalent to 375
8Kt.  equivalent to 333

 Legal standards for Silver Jewellery (PPT)
999
925 (Sterling Silver)
800

 Legal standards for Platinum Jewellery (PPT)
999
950
900
850

PPT – fineness of precious metal is expressed as parts per thousand by weight.

Legalized Solder Standard - In Conformity with Hallmarking Standards

YELLOW / RED GOLD

Karat Standard / Fineness Solder Standard (PPT)
(24Kt.)/ 999 750 (Minimum)
(22Kt.)/ 916 750 (Minimum)
(21Kt.)/ 875 750 (Minimum)
(18Kt.)/ 750 750
(14Kt.)/ 585 585
(10Kt.)/ 417 417
(9Kt.)/ 375 375
(8Kt.)/ 333 333

WHITE GOLD

Karat Standard / Fineness Solder Standard (PPT) - (Kt)
(18Kt.)/ 750 585 -  14 Kt
(14Kt.)/ 585 500 -  12 Kt.

SILVER JEWELLERY

Fineness Solder Standard (PPT)
999 650
925 Sterling Silver 650
800 650

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