Long-term capital gains tax (LTCG) on inherited Gold is calculated after adjusting the indexation benefits. Also, the holding period of the gold will be calculated from the actual date of purchase, not from the date it was passed on and became an inherited gold asset. But what if the date and cost of purchase of such Gold by ancestors is not known to inheritor? How is the LTCG from sale of such inherited Gold which is held by inheritor for more than 3 years taxed? And how is that LTCG calculated?