US $20 gold coins are made of 90% gold, which puts it at about 21 1/2 kt.
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It means that is it 18 kt gold. XXX = .750 or 18 kt. Hope that helps.
These items are solidly encased in plastic and are in a dark blue case with gold trim and an eagle on top. The 1999 set, which contains a penny, nickel, dime, quarter, and dollar, was listed on eBay today (Sept 22, 2009) for as little as $4.95 and as much as $24.95.
58.5%
Gold - or just Golden?If you have a gold-colored Sacajawea dollar minted since 2000 or a presidential dollar minted since 2007, it is worth one dollar if you found it in change. If it's in uncirculated condition or a proof coin in the original mint packaging it might retail for $2 to $4. Ordinary Sacajawea and Presidential golden dollars that you get from a bank are struck from a composition of copper with a manganese brass cladding that gives it a golden hue. Their actual composition is 88.5% copper, 6% zinc, 3.5% manganese, 2% nickel, and are NOT rare. Feel free to spend them.But if you have a 22 kt. gold dollar coin from the 1800s, it could be anywhere from a couple of hundred dollars up to a six-digit figure, depending on its date, mint mark, and condition.
a lot Yes and no. It is gold and gold is very expensive nowadays, but it is only 10kt which means that it is 41.6% pure.