Amethyst

Amethyst is a type of rock mineral quartz. Amethyst is a stone of birth for a person born in the month of February. Amethyst is usually purple, sometimes pink.
Stone sparkle like a shiny glass when exposed to the light, transparent, white fiber. 7 hardness scale.
 

common known is  

• Wulung amethyst, 
• Amethyst Kalimantan.