Dur e Najaf with sura pure 925 silver casing and Talaq aya 3 engraved: 
And will provide for him from where he does not expect. And whoever relies upon Allah – then He is sufficient for him. Indeed, Allah will accomplish His purpose. Allah has already set for everything a [decreed] extent.
This is the engraving that Imam Hussain (AS) had engraved on his ring 
One of the mustahab stones to wear in a ring.  Wearing it is equivalent to a Hajj or Umrah pilgrimage.
The reward of looking at it is similar to the reward of looking at the Prophet (s.a.w.).
It repels evil.
Comes with free ring adjuster