Hi LM,
Sugilite is a relatively "new" stone", discovered, so it goes, by a Japanese dr. around 1944.
According to my book "Healing Crystals & Gemstones", it has the following healing & magical properties:
"..calming effect on the nervous system...alleviate pain & help treatment of epilepsy and other nervous system distrubances..thought to help combat life threatneing diseases in people & pets...helps its possessor act logically and with determinition in unpleasant situations...symbolizes self-control...effective on all chakras, lionked astrologically to Pisces & Libra."
I have a sugilite pendent which I am drawn to when I have to deal with tough issues at work. I'm not a purple fan, so it was unusual for me to buy this.