All perfect praise be to Allaah, The Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ʻalayhi wa sallam, is His slave and Messenger.
There are legitimate means to protect oneself from the evil eye and envy, such as Ruqyah (healing through Quranic recitation and supplications), Thikr (expressions of remembrance of Allaah), and supplications that were recited by the Prophet, sallallaahu ʻalayhi wa sallam. We have previously underlined them in fataawa 88660 and 88705.
Wearing silver jewelry, even if Quranic verses have been recited over it, is not from among these means. We did not find any statement of the Muslim scholars indicating that one should recite the Quran over something and then wear it for that purpose. Rather, the difference of opinion among the scholars was regarding the amulets containing written Quranic verses. The preponderant view to us is to forbid all kinds of amulets given the general indication of the relevant religious texts underlining the prohibition in this regard. Please, refer to fatwa 91549.
Therefore, it is impermissible for your husband to wear this ring. People often wear silver rings and the like because of their belief that silver itself wards off the evil eye and magic, and not because Quran has been recited over it; otherwise, what is the point of wearing a silver ring in particular? There is no doubt that this is considered Shirk; it may be a major or minor Shirk depending on the belief harbored by the person.
Shaykh Haafith Al-Hakim wrote:
"The objects in reference, to which the hearts of most common Muslims incline, mostly fall into the category of minor Shirk; however, if the person places his confidence in them and believes with certainty that they can bring about benefit or harm, then it would constitute major Shirk; may Allaah safeguard us. This is because this person has relied on other than Allaah. Whoever places his trust in a sea-shell, canine tooth, ring, wolf's eye, thread, eagle's body part, string, or the soil of a grave... Allaah will leave his affair to that which he has placed his trust in..." [Maʻaarij Al-Qabool]
Allaah knows best.