Platinum .950 vs. Platinum .900

Understand the difference between .950 and .900 platinum.

Last edited: 9/16/2019

The notations ".900" and ".950" speak to the purity of platinum, but not to its quality; the percentage is too small to significantly affect the quality. Depending on the method of fabrication and the type of jewelry being made, the manufacturer will choose the alloy that delivers the best finished piece.

A ".950" purity hallmark indicates that the pure platinum has been alloyed with 5% of another metal.

A ".900" purity hallmark indicates that the pure platinum has been alloyed with 10% of another metal. 

Rio Grande carries a variety of platinum casting pieces, fabrication metals and findings