100% Barium Crystal.
This stunning Dichro Glass Twist ear spiral is a very rich, luxurious piece of jewellery that will stand out anywhere!
Dichroic glass is glass containing multiple micro-layers of metal oxides (such as gold, silver, titanium, chromium, aluminium, zirconium, magnesium, silicon) which give the glass dichroic optical properties.
Dichroic glass was originally developed by NASA for use in satellite optics and spacesuit visors!