Prasiolite / Green Amethyst
Prasiolite is a green variety of quartz, with its colour typically coming from Fe²⁺ ions within the crystal structure. Natural prasiolite is exceedingly rare, having been first discovered in the early 19th century in Lower Silesia, Poland with only a few other deposits known to exist.
Birthstones & Anniversaries
Amethyst is the birthstone for February and the gem for the 6th and 17th wedding anniversaries.
Colour: Shades of green
Crystal habit: Hexagonal prisms
Cleavage: None
Fracture: Conchoidal[1]
Tenacity: Brittle[1]
Mohs scale hardness: 7 – lower in impure varieties[1]
Diaphaneity: Transparent to nearly opaque
Specific gravity: 2.65
Refractive index: 1.544 to 1.553[2]
Birefringence: 0.009[3]
Ultraviolet fluorescence: None
