Abu Dawud
Signet Rings
Book Number: 029 / Hadith Number: 4224
Narated By Abu Hurairah : The Prophet (pbuh) said: If anyone wants to put a ring of fire on one he loves, let him put a gold ring on him: if anyone wants to put a necklace of fire on one he loves, let him put a gold necklace on him, and if anyone wants to put a bracelet of fire on one he loves let him put a gold bracelet on him. Keep to silver and amuse yourselves with it.