Faceted Aventurine Necklace

Necklace of 15.75 inches composed of cut Aventurines with facets and color Emerald.
The name Aventurine comes from its discovery by chance (Italien:"all' ventured") about 1700.
It belongs to the group of Quartz. Important layers in Brazil and in Russia. Hardness on the MOHS scale of hardness: 7. Density: 2.65.