My Sugilite rough comes from the Wessels mine in the northern Cape Province of South Africa, sugilite is mined from a strata-bound manganese deposit. It also comes from several other areas including Japan where it was originally found. 

When you look at sugilite under different lights the color will change. Also in some of my cabs you may find Richterite, a rare mineral found with Sugilite which can modify the colors of purple and lavender.