Platinum alloy and method of production thereof

An ornamental article comprising a platinum alloy, said platinum alloy consisting essentially of:

• 55 to 63 wt. % of platinum,
• 2 to 10 wt. % of cobalt and
• 27 to 43 wt. % of copper,
• wherein said ornamental article is selected from the group consisting of a ring, a necklace, an earring, a watch band, and a watch body.

An ornamental article comprising a platinum alloy, said platinum alloy consisting essentially of:

• 55 to 63 wt. % of platinum,
• 2 to 10 wt. % of cobalt and
• 27 to 43 wt. % of copper,
• wherein said alloy contains a total of 0.001 to 2 wt. % of one or more property enhancing additives selected from the group consisting of palladium, iridium and ruthenium.

A method of preparing a platinum alloy, comprising the steps of:

• providing alloy components, said alloy components consisting essentially of:
• 55 to 63 wt. % of platinum, 2 to 10 wt. % of cobalt, and 27 to 43 wt. % of copper;
• blending the alloy components together;
• and
• melting the alloy components to form said alloy, wherein said alloy contains a total of 0.001 to 2 wt. % of one or more property enhancing additives selected from the group consisting of palladium, iridium and ruthenium.