Composition Of Some Alloys

This table shows the components of each metal,  the boiling point and Specific Gravity.

METALS AU AG CU ZN OTHER MELTING POINT SP.GRAV.
Jeweller’s Brass 88 12 1030 C 1886 F 8.7
Copper 100 1083 1981 8.9
Gold (Fine) 100 1063 1945 19.3
22K yellow 92 4 4 977 1790 17.3
22K coinage 90 10 940 1724 17.2
18K yellow 75 15 10 882 1620 15.5
18K yellow 75 12 ½ 12 ½ 904 1660 15.7
18K green 75 25 966 1770 15.6
18K rose 75 5 20 932 1710 15.5
18K white 75 25 Pd 904 1660 15.5
14K yellow 58 25 17 802 1476 13.4
14K green 58 35 7 835 1535 13.6
14K rose 58 10 32 827 1520 13.4
14K white 58 42Pd 927 1700 13.7
10K yellow 42 12 41 5 786 1447 11.6
10K yellow 42 7 48 5 876 1609 11.6
10K green 42 58 804 1480 11.7
10K rose 42 10 48 810 1490 11.6
10K white 42 58Pd 927 1760 11.8
Nickel Silver 65 17 18Ni 1110 2030 8.8
Silver (fine) 100 962 1763 10.6
Sterling 92 ½ 7 ½ 893 1640 10.4

Source: Complete Metalsmith, Tim McCreight

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