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Gold coins FS/T
- Thread starter ringading
- Start date
Grubstake said:
Grubstake,that would be about what they are worth each ,there are two,a good used Compadre goes for about $90.00
Like I said the coins are 22 k which,wikipedia says is 91.66%.That would be 1.5g each of pure gold.
Carat purity is measured as 24 times the pure mass divided by the total mass:
K = 24\,\frac{M_\text{g}}{M_\text{m}}
where
K is the carat rating of the material,
M_\text{g} is the mass of pure gold or platinum in the material, and
M_\text{m} is the total mass of the material.
Therefore, 24-carat gold is fine (also includes down to 99.95% gold by mass), 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.
In England, the carat was divisible into four grains, and the grain was divisible into four quarts. For example, a gold alloy of \tfrac{381}{384} fineness (that is, 99.2% purity) could have been described as being 23-carat, 3-grain, 1-quart gold.
The carat system is increasingly being complemented or superseded by the millesimal fineness system, in which the purity of precious metals is denoted by parts per thousand of pure metal in the alloy; e.g. 18-carat gold, 75% Au, would be called 750.
Carat conversion:
58.33% - 62.50% = 14k (acclaimed 58.33%)
75.00% - 79.16% = 18k (acclaimed 75.00%)
91.66% - 95.83% = 22k (acclaimed 91.66%)
95.83% - 99.95% = 23k (acclaimed 95.83%)
99.95 and above = 24k (acclaimed 99.99%)
