Shares of Gitanjali Gems on Thursday settled with losses of 20 per cent after the company came under the scanner of various investigating agencies following PNB's declaration of nearly Rs 11,500-crore fraud. Following the downtrend in the counter, the market capitalisation of the company was eroded by Rs 139.69 crore to Rs 556 crore at the end of Thursday's trading session. Meanwhile, some other jewellery stocks witnessed a similar fate with PC Jeweller ending the day at Rs 356.40, down 5.31 per cent, Tribhovandas Bhimji Zaveri (TBZ) at Rs 112.55 down 2.64 per cent.