Faceted Gray Quartz & Swarovski Asymmetrical Necklace

A note of interest about this piece is the gemstones. I have found very little information about Gray Quartz, all I know is that it has iridescent flashes along with gray inclusions. I thought at first it was miss-marked somehow and was a type of tourmalinated or rutilated quartz, though it was off in the description. I have searched my books and the web to find that yes gray quartz does exist and that the mineral that creates the flash and the gray inclusions could be silver, the mystery remains unsolved, I am working on it, and it's still a beautiful stone.