A:
If the share of each one of the heirs reached the Nisab (minimum amount upon which Zakah is due) on its own or combined with her personal wealth, be it cash or goods, bearing in mind that
The Nisab of gold on which Zakah is payable is equal to ninety two (92) grams. If the possessed gold reaches that Nisab then the Zakah due on it as 2.50% of its total value per each year that has passed while in the possession of its owner. This is because Zakah is jointly inseparable from Salah (Prayer) in the Holy Qur'an. Allah (Exalted be He) says:
And those who hoard up gold and silver [Al-Kanz: the money, the Zakat of which has not been paid], and spend it not in the Way of Allah,
meaning: those who do not pay Zakah for their possessions of gold and silver,
...Announce unto them a painful torment.
On the Day when that (Al-Kanz: money, gold and silver the Zakât of which has not been paid) will be heated in the Fire of Hell and with it will be branded their foreheads, their flanks, and their backs, (and it will be said unto them): "This is the treasure which you hoarded for yourselves. Now taste of what you used to hoard."
May Allah grant us success. May Peace and Blessings of Allah be upon our Prophet Muhammad, his family and his Companions!