Men can wear platinum rings as long as there is no extravagance or temptation.
Sheikh M. S. Al-Munajjid, a prominent Saudi Muslim lecturer and author, states:
“There is nothing wrong, as far as Islam is concerned, as regards men wearing platinum rings as long as the following two conditions are met:
1- That it is not an extravagance on the part of one who cannot afford to wear this kind of jewelry.
2- That it should not be worn in order to cause temptation.
It is noteworthy that men are prohibited to wear gold rings.”
On the basis of the above-mentioned, we conclude that men are permitted, as far as Islam is concerned, to wear platinum rings as long as the conditions mentioned above are met.