Verily, it is a Sarh Mumarrad of Qawarir Sarh means a palace or any lofty construction.

Allah says of Fir`awn -- may Allah curse him -- that he said to his minister Haman:

﴿ابْنِ لِى صَرْحاً لَّعَـلِّى أَبْلُغُ الاٌّسْبَـبَ﴾

(Build me a Sarh that I may arrive at the ways.) (40:36-37) Sarh is also used to refer to the high constructed palaces in Yemen. Mumarrad means sturdily constructed and smooth.

﴿مِّن قَوارِيرَ﴾

(of Qawarir) means, made of glass, i.e., it was built with smooth surfaces. Marid is a fortress in Dawmat Al-Jandal. What is meant here is that Sulayman built a huge, lofty palace of glass for this queen, in order to show her the greatness of his authority and power. When she saw for herself what Allah had given him and how majestic his position was, she submitted to the command of Allah and acknowledged that he was a noble Prophet, so she submitted to Allah and said:

﴿رَب إِنِّى ظَلَمْتُ نَفْسِى﴾

(My Lord! Verily, I have wronged myself,) meaning, by her previous disbelief and Shirk and by the fact that she and her people had worshipped the sun instead of Allah.

﴿وَأَسْلَمْتُ مَعَ سُلَيْمَـنَ لِلَّهِ رَبِّ الْعَـلَمِينَ﴾

(and I submit, together with Sulayman to Allah, the Lord of all that exists.) meaning, following the religion of Sulayman, worshipping Allah alone with no partner or associate, Who created everything and measured it exactly according to its due measurements.

﴿وَلَقَدْ أَرْسَلْنَآ إِلَى ثَمُودَ أَخَاهُمْ صَـلِحاً أَنِ اعْبُدُواْ اللَّهَ فَإِذَا هُمْ فَرِيقَانِ يَخْتَصِمُونَ - قَالَ يقَوْمِ لِمَ تَسْتَعْجِلُونَ بِالسَّيِّئَةِ قَبْلَ الْحَسَنَةِ لَوْلاَ تَسْتَغْفِرُونَ اللَّهَ لَعَلَّكُمْ تُرْحَمُونَ - قَالُواْ اطَّيَّرْنَا بِكَ وَبِمَن مَّعَكَ قَالَ طَائِرُكُمْ عِندَ اللَّهِ بَلْ أَنتُمْ قَوْمٌ تُفْتَنُونَ ﴾

(45. And indeed We sent to Thamud their brother Salih, (saying): "Worship Allah.'' Then look! They became two parties quarreling with each other.) (46. He said: "O my people! Why do you seek to hasten the evil before the good Why seek you not the forgiveness of Allah, that you may receive mercy'') (47. They said: "We augur an omen from you and those with you.'' He said: "Your omen is of Allah; nay, but you are a people that are being tested.'')