Platinoid

Platinoid is a term that has been used to describe a group of platinum-like metals. Historically, this term often referred to alloys that mimicked the appearance and some properties of platinum but were composed of other, more readily available metals. These alloys were developed as a less expensive alternative to pure platinum for decorative and some industrial applications.

The composition of platinoid alloys varied over time and depending on the manufacturer. Common components included nickel, copper, zinc, and sometimes small amounts of other metals like tin. These metals were combined to create a silvery-white appearance, hardness, and resistance to tarnishing that could resemble platinum. Early platinoids were sometimes referred to by proprietary names, reflecting their specific formulations.

While platinoids served a purpose as a more affordable substitute for platinum, their properties were not identical to the precious metal. They generally lacked the extreme resistance to corrosion and chemical inertness that made platinum so valuable in specialized fields such as jewelry, dentistry, and catalytic converters. As refining techniques for platinum improved and its cost fluctuated, the use of platinoid alloys diminished in many high-end applications. However, they may still be found in vintage jewelry or certain decorative items where cost-effectiveness was a primary consideration. The term itself is less common today, with specific alloy compositions being more clearly defined.