Amethyst Faceted Gemstone 
Weighs 4.6 carat
Measures 18 mm x 7 mm
Very nice stone, would make a beautiful ring (I thought about it, have to let them go...)
 
A form of quartz, which has purple inclusions.
Amethyst is Loved by many and often the first crystal many of us attract. Mine was found by a friend in the street in Scotland, 30 years ago,  on the way to my house, I still have it!