Fatwa ID: 01617
Answered by Mufti Mohammed Tosir Miah
A Muslim friend of mine who has a jewellery shop has asked the following: (Please provide an answer; try to state adillah if possible)
In our shop, among the normal gold rings and necklaces, we also sell those that have 'Allah' written on them, Christian crosses on them, Hindu symbols etc. Basically, we cater for all religions in our cosmopolitan area. Imam, is what we're doing permissible according to Islam?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
In the Holy Qur’an Allah has said:
“O people, eat of what is in the earth permissible and good.” 
Sahl Ibn Abdullah has said salvation depends on three things: eating halal, fulfilling obligations and following the Sunnah of the Prophet . 
Allah has ordered us to eat from the things which are halal and good for us, hence the income we earn should be lawful in order for our sustenance to be lawful.
Regarding your question, it will be permissible to sell gold necklaces with Allah’s name on. Gold is something which is unlawful for men to wear but lawful for women. The Islamic principle is that something, which may be used for lawful purposes, is permissible to sell. As these gold necklaces have a permissible aspect, such as the fact that women may wear it, therefore they are deemed permissible to sell. 
However, selling necklaces which have crosses on them or Hindu symbols will be unlawful.
Allah in the Holy Qur’an says:
"And assist one another in acts of righteousness and piety and do not assist one another in act of transgression and sin.” (Surah Maaidah v.2)
Only Allah knows best
Written by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 Surah Baqarah v.168
 Maariful Qur’an p.419 v.1
 Taqrir Tirmizi p.221 v.1 & Takmilah Fathul Mulhim p.551 v.1