Can Muslim Men Wear Platinum?
Question

Is it permissible for a man to wear a ring made of platinum?
Praise be to Allah.We put this question to Sheikh Muhammad ibn Salih al-‘Uthaymin, may Allah have mercy on him, who answered as follows:
Men can wear rings made of platinum with two conditions:

That it is not an extravagance on the part of one who cannot afford to wear this kind of jewellery
That it should not cause any kind of fitnah (temptation), such as the man being young and perhaps causing fitnah by wearing it.

The basic principle with regard to clothing is that everything is permissible except gold rings , which are haram for men as is well known. 
For more, please see these answers: 6697 , 105400 , 68039 , and 1980 . 
And Allah knows best.