There is an interesting variety of amethyst and I can recall the few I have come across in my collection of these stones.
Geode Amethyst - normally exist in an oval egg shape and commercially available in halves, which appears like a miniature cave. It is a good fengshui attracting stone when placed in the wealth corner of the house. Placing it in front of the main entrance would prevent negative energies from intruding into the house. A pair adorn my altar.
Ametrine - A combination of Amethyst and Citrine. It integrates the psychic Third Eye Chakra and the Mental Solar Plexus Chakra, giving you insight and mental clarity as you develop your psychic faculties. It is a wealth attacting stone when adorn as a jewellery and offers effective protection against negative energies. I used to have it in the formation of a Star Of David pendant.
Double Termination Amethyst: - Said to be from Vera Cruz and South Africa, the naturally formed double termination has overpowering vibrations and immediately leads us into the meditative state. This variety normally has paler purple colour. To me, it not only affect the third eye chakra but also the throat and in particular the crown almost instantaneously as I hold it in my receptive hand. I own a few pieces which I strung with silver metal wires and wear them occasionally.
Other varieties of amethyst -
Dog Tooth Amethyst: Stone shaped like a tooth with dense purple and white cement colour. Vibrations are heavier and provides good grounding qualities besides uplifting our 3rd eye energies so that we do not get too space out.
Elestial Amethyst: Already elestial, normally in smoky variation and some come with fossilised water, by itself is a mysterious stone, a storage house of ancient knowledge. I suppose the amethyst inclusion would give it a more spiritual enhancement.
Chevron Amethyst: Very beautiful deep and dark purple stone.
Rutiliated Amethyst . Again, a rare variety, and the rutiliated needles are supposed to provide the amethyst with the electrical zap to make the vibrations more lively and vibrant.
Once a mother came and consulted me about her 10 year old son whom I suspected could be an Indigo child. The boy has overall refined energy and loves to place his two hands in a prayer's gesture and pay respects to all Buddha and Boddhisattvas whenever he comes across their statues. The mother showed me an amethyst bracelet she gave to her son to wear and complained that the stones became more red in appearance instead of the purplish colour when she originally bought it. I supposed that being spiritual, the boy must have absorbed more of the blue colour in the amethyst stones (purple being a combination of the colours of blue and red), leaving behind more of the red colours which make the stones look more red. But subsequently I pondered over this encounter and asked myself the question why not the reverse as the boy should have absorbed more of the red for grounding leaving behind more of the blue in the stone? Perhaps, other members may have a story or two to tell about their amethyst....^^
Blessings
Diamond