Essentially the most historic of the August birthstones, sardonyx is a mix of two kinds of chalcedony (cryptocrystalline quartz): sard and onyx. Bands of brownish red to brown to darkish orange sard alternate with normally white or black levels of onyx. You can even acquire our free of charge chakra https://www.gemsbiz.com/blog/explore/birthstones-by-zodiac-sign