This beautiful glass ring has been carefully made from Borosilicate glass, this glass is both strong and durable (similar to pyrex)  The ring is comfortable to wear and features black glass with a subtle sparkle.  
This ring is sized at a UK N US 7 
This is worn at your own risk, it is durable and whilst every effort has been made to make it as strong as possible it is still made from glass, I would advise that you don't wear it whilst carrying out manual labor or other tasks that result in impact.