Purple. Violet. Lavender. Lilac. Even GREEN!! Amethyst comes in so many beautiful shades it is hard to choose my favorite. Different locations produce varying color spectrums. My personal belief is that stones pick you as much as we may think otherwise. In my personal experience in working with Amethyst I find that I am drawn to certain colors and formations for different things. Always go with your own personal intuition and what feels right when choosing your stones.
Most folks know Amethyst to be the February birthstone and one of the more common purple gemstones/crystals when folks are building their personal crystal cabinet collection. A favorite among many and a stone I recommend to all. A beautiful stone in it's own right it has long been used through history, healing and folklore practices.
Throughout history Amethyst has been used in various jewelry. Fine Amethysts are featured in the British Crown Jewels and were also a favorite of Catherine The Great, and Egyptian royalty. Leonardo da Vinci wrote that Amethyst was able to dissipate evil thoughts and quicken one's intelligence. Amethyst and other stones will always hold a place in history and lore.
In crystal healing Amethyst is associated with a few things such as sobriety, anxiety control, dreaming and protection. It is believed to help those going through recovery of any sort and makes a great stone for any type of addiction or addictive behavior. You can add clusters in the corners of your living space to protect your home and ease nightmares. You can use these in physical healing grids and meditations as well.
Chevron Amethyst is said to be especially good for Pisces and provides them with a good source for grounding. It is associated with the element of Air. The chakra that it corresponds with is Third Eye and Crown.
In pagan and wiccan rituals it is associated with Imbolc.
Amethyst comes in a variety of formations and colors as mentioned above but follow your own feelings when working with this stone.