This is a beautiful stone called Rainbow Aventurine - one of my favorites. It is hanging from one of my hand-made sterling silver components with a loose wire-wrap. A great colour for spring.
The stones in this bracelet are a slightly different cut of Kyanite. This stone can range in colour from blue to green; these stones are more on the blue side. The sterling silver hand-made, hand-shaped centre component is typical of the designs I like to incorporate.
This is a mix of both lighter and darker Lemon Quartz stones. Both the faceted cube cut as well as the "slab" cut are not commonly seen with this stone.