Amethyst from Chala Mine, Bulgaria

Amethyst from Chala Mine, Bulgaria.
 
 Rare piece with large crystals in "Sword" , superb color !
 Unique museum piece ! Piece for discerning collectors .
 Ideal for connoisseurs seeking excellence , its Amethyst Crystals will bring satisfaction.
 It deserves its place in the most refined collections or the most prestigious showcases .
 
 Video: https://www.youtube.com/watch?v=lC_i69NPmyo
 
 Origin: Chala Mine, Bulgaria
 Size: 18cm by 12.5cm by 10.5cm for 1kg835
 Chemical formula: SiO2
 Crystal system: Trigonal
 Hardness Mohs scale: 7
 
 Definition: It is a variety of purple quartz , found throughout the world ( Amethyst from Brazil, Uruguay, Africa, Mexico, Bulgaria, France …). This pronounced purple color is due to silicon dioxide . It is found in a very translucent to very dark format. We will find amethyst as an element of choice in jewelry and classified as a fine stone according to the quality of the crystals . It is found in various forms: Geodes of Amethysts , Druses or clusters of Crystals , Crystal , pebbles raw or polished, Spheres or Eggs , sometimes also in slices .