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2. Replacement banknote - Wikipedia

   en.wikipedia.org/wiki/Replacement_banknote

   It is rare that the replacement banknote has the same serial number as the original faulty one. A replacement note will have its own serial-numbering system that separates it from the normal numbering system. The star also appears on notes that have a serial number higher than 99,999,999 because the number machines cannot print over eight ...

3. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   For example, a gold alloy of 127 ⁄ 128 fineness (that is, 99.2% purity) could have been described as being 23-karat, 3-grain, 1-quart gold. The karat fractional system is increasingly being complemented or superseded by the millesimal system, described above for bullion, though jewelry generally tends to still use the karat system.

4. Coin grading - Wikipedia

   en.wikipedia.org/wiki/Coin_grading

   Coin grading [1] is the process of determining the grade or condition of a coin, one of the key factors in determining its collectible value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasionally the country/state in which it was minted.

5. Precious metal - Wikipedia

   en.wikipedia.org/wiki/Precious_metal

   In 2012, the Perth Mint produced a 1-tonne coin of 99.99% pure gold with a face value of $1 million AUD, making it the largest minted coin in the world with a gold value of around $50 million AUD. [2] China has produced coins in very limited quantities (less than 20 pieces minted) that exceed 8 kilograms (260 ozt) of gold.

6. Glossary of notaphily - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_notaphily

   A note printed with a special symbol before the serial number, or with a special serial number prefix, used to replace notes damaged during the manufacturing process. US replacement notes are called Star Notes because a five pointed star is positioned at the beginning or end of the serial number.

7. BIS hallmark - Wikipedia

   en.wikipedia.org/wiki/BIS_hallmark

   The BIS Hallmark is a hallmarking system for gold as well as silver jewellery sold in India, certifying the purity of the metal. [1] [2] It certifies that the piece of jewellery conforms to a set of standards laid by the Bureau of Indian Standards, the national standards organization of India.