Patent ID: 11970762
Assignee: nan
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 6:
7. A gold alloy composition for jewellery manufacture, the gold alloy composition consisting of:
a) 75 to 97% by weight of gold,
b) a combination of at least two components selected from the group consisting of:
0.01 to 1.5% by weight of zirconium,
0.01 to 1.5% by weight of magnesium, and
0.01 to 1.5% by weight of titanium,

c) 0 to 24.98% by weight of copper,
d) 0 to 6.225% by weight of zinc,
e) 0 to 6.225% by weight of Silver;
wherein zinc and silver are present in equal amounts by weight in the gold alloy composition;
wherein the gold alloy composition has lower specific gravity, higher springiness, and higher wear resistance than a ternary gold alloy consisting of gold, copper, and silver;
wherein the gold alloy composition and the ternary gold alloy contain an identical gold content.