Change arc pendant with tumbled stone

Change arc with drilled crystal. The pendant is made from silver coloured brass and is nickel free. It is about 3 cm wide and 2 cm high from the tube to the bar. The crystal is about 3 x 2 x 1,5 cm groot, measured in the middle. This pendant fits drilled crystals, which you can exchange by twisting off the little ball from the bar so the crystal comes loose. The crystal can be up to 1 cm high from the drilled hole. The bar is 1,2 mm in diameter.