Chevron Amethyst belongs also to the quartz family as it combines both white quartz and purple Amethyst quartz in a chevron or banded pattern. It is said to repel all kinds of negative influences.
Such an intriguing gemstone ... Iolite or water-sapphire shows off another color depending the angle you look at it (called pleochroism). This gemstone with a light to dark blue color and a violet tinge ... is bluer than amethyst, softer than sapphire and harder than Kyanite, the latter lacking the purple tinge. By the way, it is not a quartz, either. Iolite is linked to the third eye chakra and is a calming, balancing gemstone.