Adjustable ring in gold plated brass with a raw semi-precious stone Tourmaline from Madagascar.
 
Each stone is unique and preserved in its natural shape and color. There may be slight variations in tone or size but the feel remains the same. These semi-precious stones are not as hard as gemstones so there may be subtle inclusions or markings. 
 
Maintenance tips :
 
In order to best preserve your jewelry and maximize its lifespan, you should avoid wearing it in the shower, swimming pool, playing sports, or when you sleep.
 
Made by Concerto No.1
The brand concept is unique and original: to sublimate the raw aspect of the stones while controlling the chain of creation of its jewelry.
Visit their page www.concerto1.com