Creating a silver flower

Start by opening an image of a flower. The closer the better.

Press Ctrl+Shift+U to desaturate.

Press Ctrl+L and adjust level settings as shown.
Press Ctrl+U and apply hue/saturation settings as shown.

Duplicate the layer and change the color mode to multiply.
Add some sparkles to the silver flowers using sun shape from custom shape tool fly out.
Apply the shape in white color to random places on flower.