Diamond and sapphire necklace

Very large piece. Has a regested valuation of $47150.00. At NZ US exchange rate of NZ 76c So currant valuation would be around $57000.00. The necklace has 39 sapphires and 507 diamonds. The large sapphire is 150cwt and is from India. It is surounded by 24 x 3.8mm trillion cut diamonds. The smaller sapphire drop is surounded by 10 x 3.8mm trillion cut diamonds. Diamonds are GH colour and SI clarity. You have to see this piece to appriciate it. Reserve is half the valuation. This is kept in a bank vault so If you would like to view we would need a time within banking hours.