cardlady22
dark blue and white might be sodalite or dumortierite
blue/purple end of the spectrum possibilities:
agate, amethyst, charoite, fluorite, iolite, purpurite, tanzanite
more purple agate
blue/purple end of the spectrum possibilities:
agate, amethyst, charoite, fluorite, iolite, purpurite, tanzanite
more purple agate