Hypersthene 
Siza 3cm
Plus
FREE 925 Silver Chain with every pedant.
Choose from One in picture in 45cm, 50cm or 55cm.  Or normal 45cm chainlink.
 
Hypersthene gemstones are made up of magnesium and iron silicate, and they form a greenish rock. The word "hypersthene" comes from a Greek word that means "over strength," no doubt referring to its hardness when contrasted to minerals like hornblende, with which it was frequently confused. These days, "hypersthene" isn't a widely used name; instead, it's classified as enstatite or ferrosilite. Hypersthene, on the other hand, is the link between the two minerals. Enstatite has higher magnesium content, ferrosilite has a higher iron content, and hypersthene is in the middle, with about 50% iron.
 
Origin: New York.
 
These are designed and manufactured by hand in a factory that practises sustainability in India.