Color changing SCAPOLITE gemstone!.. After 'heat treatment' of this rare type of scapolite, it changes color instantly under UV light and holds that blue color for about 3 or more minutes. :
Scapolite Mineral Information photos and Facts, gems
Scapolite: The gemstone scapolite information and pictures
Scapolite Gemstone Rough For Facetting Natural Light Golden - Slightly Included