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Isle of Man 2015 - 175th Anniversary of the Penny Black Stamp-Proof Fine 999.9 1/5oz Gold Crown.
For example, there are a number of different gold alloys used in dentistry and they can have a karat value ranging anywhere from around 10 to 22. At 10 karats, the alloy is about 40% gold. At 20 karats, it's roughly 80%.Probably on average, the typical yellow-colored gold dental crown is around 16 karat (67%). scrap dental crown's value is simply based on how much precious metal it contains, which is a function of both its size (weight actually) and the type of alloy that's been used to make it.