Platinum doesn't have a specific, dedicated word in Sanskrit like gold (सुवर्ण, suvarna) or silver (रजत, rajata).

However, you could use a descriptive phrase like:

* शुक्ला रजत: (shukla rajata) - literally "white silver"

* श्वेत रजत: (shweta rajata) - literally "bright silver"

These phrases would be understood to refer to platinum due to its silvery white color.

You could also use the word प्लाटिनम (plaatinam), which is the Sanskrit transliteration of the English word "platinum."