Nisab = 87.48 g of pure gold (7.5 tola). Zakat is 2.5% of market value after one lunar year. Scholars differ on personal-use jewellery — please confirm with a qualified scholar.
2.5% of its market value, once a lunar year has passed and your holding reaches the nisab.
7.5 tola = 87.48 grams of pure (24K) gold. Below this, no zakat is due on gold.
Scholars differ. This calculator shows the numbers either way — consult a qualified scholar for your situation.
Pure-gold content is valued at today's 24K Dubai reference rate (AED 497.25/g).