This bracelet has a purple/green centre and an opalescent white  surround.  Being dichroic glass the colour changes from purple to green as it cathces the light from different directions.  The main body of the bracelet is silver plated.  It is adjustable and can be squeezed in or stretched out to fit.  
 
Please note each piece is made by hand and therefore the product may vary slightly from the picture. 
 
Glass diameter is 2cm
 
Widest part of bracelet 6.5cm