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2. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   24-carat gold is pure (while 100% purity is very difficult to attain, 24-carat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-carat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-carat gold is 12 parts gold (12 parts another metal), and so forth. [20]

3. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   The highest karat version of rose gold, also known as crown gold, is 22 karat. Amongst the alloys made of gold, silver, and copper, the hardest is the 18.1 K pink gold (75.7% gold and 24.3% copper). An alloy with only gold and silver is the hardest at 15.5 K (64.5% gold and 35.5% silver).

4. Kate Middleton Wore Her Engagement Ring in Public for the ...

   www.aol.com/kate-middleton-wore-her-engagement...

   The Princess of Wales had recently chosen a four-ring stack in place of the famed diamond and sapphire ring. ... in place of her 12-carat sapphire engagement ring. ... gold wedding band, ...

5. Hallmark - Wikipedia

   en.wikipedia.org/wiki/Hallmark

   Under the current law, on all gold, silver, platinum or palladium watches cases made in Switzerland or imported into Switzerland, there shall be affixed, [21] near the Maker's Responsibility Mark and his indication of purity, the official Hallmark, the head of a Saint Bernard dog. Only precious metal watch cases must be hallmarked.

6. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.

7. Purity Rings! Frankie Jonas, GF Anna Win Halloween as ... - AOL

   www.aol.com/entertainment/purity-rings-frankie...

   Swift never wore a purity ring, but she briefly dated Joe in 2008 while the Jonas Brothers were on their Burnin’ Up Tour. The “Anti-Hero” singer later revealed that the duo split when Joe ...