Amethyst, Rose Quartz necklace

I believe the stones are Rose quartz, Amethyst and natural light pink to white colored quartz. The large pendant mounted stone that hangs is believed to be quartz but in a deep brown with streaks of light brown and white. In the last picture I held it up to the light to see the extension if beauty the stone reveals on it's backside. The necklace measures: 19" in length The pendant measures: 2" in length with bale