Quite possibly the most ancient of the August birthstones, sardonyx is a mix of two forms of chalcedony (cryptocrystalline quartz): sard and onyx. Bands of brownish crimson to brown to darkish orange sard alternate with commonly white or black layers of onyx. For a cooling crystal, the aquamarine crystal can https://doctorbookmark.com/story13985363/top-latest-five-buy-birthstone-urban-news