Must the zakat be paid on gold that the deceased mother did not pay zakat on, knowing that it was sometimes used for adornment and had reached the nisab?

The preponderant view to us is that jewelry made for adornment is not subject to zakat. This is the opinion of the majority. However, according to the view that zakat is obligatory on it — which is more cautious — if the gold reaches the nisab and a year passes while it is with the mother, its zakat becomes obligatory and should be disbursed from her estate before its division. And whoever's share of the gold reaches the nisab must pay the zakat on his share.