Meaning
Pearl-teeth; teeth likened to pearls or jewels.
Literally: pearls of the teeth
How Iqbal uses it
The teeth as a row of gauhar behind the parted ruby lip complete the jewel-imagery of the smiling mouth, pearls set against the ruby of the lip.
See it in the verse
Gauhar-e-Dandaan in Iqbal’s couplets
Giraanbaha hai to hifz-e-khudi se hai warna
Gauhar mein aab-e-gauhar ke siwa kuchh aur nahin
Gauhar mein aab-e-gauhar ke siwa kuchh aur nahin
If you are precious, it is from guarding your selfhood; otherwise a pearl is nothing but the lustre that is its own.
Selfhood · Self-Knowledge
Tamanna dard-e-dil ki ho to kar khidmat faqeeron ki
Nahin milta ye gauhar baadshahon ke khazeenon mein
Nahin milta ye gauhar baadshahon ke khazeenon mein
If you long for a heart that truly feels, then serve the poor and the humble; this jewel is not found in the treasuries of kings.
Humility · Love · Self-Knowledge