The Sign of Allah in the progressive creation of Man from Clay then from Nutfah and thereafter

Allah tells us how He initially created man from an extract of Tin. This was Adam, peace be upon him, whom Allah created from sounding clay of altered black smooth mud. Ibn Jarir said, "Adam was called Tin because he was created from it." Qatadah said, "Adam was created from Tin." This is the more apparent meaning and is closer to the context, for Adam, upon him be peace, was created from a sticky Tin, which is a sounding clay of altered black smooth mud, and that is created from dust, as Allah says:

وَمِنْ ءَايَـتِهِ أَنْ خَلَقَكُمْ مِّن تُرَابٍ ثُمَّ إِذَآ أَنتُمْ بَشَرٌ تَنتَشِرُونَ

ثُمَّ إِنَّكُمْ يَوْمَ الْقِيَامَةِ تُبْعَثُونَ (Then you are to be raised again on the Day of Judgment - 23:16) so that his deeds and actions in this world may be weighed and he may be sent to Paradise or Hell as he deserves. This is how a man's life would end. Further on there is a brief mention of the events which will take place in the intervening period between his life in this world and the life to come, and of the gift and blessings which Allah will bestow upon him. This is prefaced by a reference to the creation of the skies.