The lapidaries of precious stones have quitted. Their descendants lack the skill even to work on lead. At the places where their ancestors worked, you now find smiths heating the pewter. (The bonafide guides have departed from the world).
And Ibrahim bequeathed to his children and so did Yaqoob,”O my children! Allah has indeed chosen (this) faith for you. So die not except when you are Muslims. (132, Al-Baqarah).

Experts of diamonds and rubies are gone,
Their successors hardly know the worth of brass,
In their place iron smiths hammering base metals, I find.

Those who cut and polish diamonds have gone away,
Their descendants cannot even work lead,
In their place are now smiths working on base metal.