Gold Fountain Pen

pradaboy

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May 2, 2019
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All Treasure Hunting
Rose gold is made of pure gold mixed with copper and silver alloys. Rose gold is real but it's not made entirely of gold. ... The more copper used, the redder the gold appears. A common mix—or alloy—for rose gold is 75% gold and 25% copper by mass (18K).

https://www.diamonds.pro/education/platinum-vs-gold/
 

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